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A percussion instrument is a musical instrument that is sounded by being struck or scraped by a beater including attached or enclosed beaters or rattles struck, scraped or rubbed by hand or struck against another similar instrument. Excluding zoomusicological instruments and the human voice , the percussion family is believed to include the oldest musical instruments. In spite of being a very common term to designate instruments, and to relate them to their players, the percussionists, percussion is not a systematic classificatory category of instruments, as described by the scientific field of organology . It is shown below that percussion instruments may belong to the organological classes of idiophone , membranophone , aerophone and chordophone .

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131-530: A gong is a percussion instrument originating from Southeast Asia , and used widely in Southeast Asian and East Asian musical traditions. Gongs are made of metal and are circular and flat or bowl-like in shape, and can come in various sizes. They are typically struck with a mallet. They can be played alone, giving a characteristic "crashing" sound, or played as part of a tuned set that produce bell-like sounds. The earliest possible depictions of gongs

262-444: A bronze alloy composed of a maximum of 22 parts tin to 78 parts copper, but in many cases the proportion of tin is considerably less. This alloy is excessively brittle when cast and allowed to cool slowly, but it can be tempered and annealed in a peculiar manner to alleviate this. When suddenly cooled from red heat, the alloy becomes so soft that it can be hammered and worked on the lathe then hardened by reheating. Afterwards,

393-644: A limited engagement at Mayi involving the assassination of the Chanyu would throw the Xiongnu realm into chaos and benefit the Han. When this plot failed in 133 BC, Emperor Wu launched a series of massive military invasions into Xiongnu territory. The assault culminated in 119 BC at the Battle of Mobei , when Han commanders Huo Qubing ( d.  117 BC ) and Wei Qing ( d.  106 BC ) forced

524-589: A melody . Nipple gongs are used in Chinese temples for worship and Buddhist temples in Southeast Asia. These are the primary gong in the traditional Philippine music of kulintang . In Indonesian gamelan ensembles, instruments that are organologically gongs come in various sizes with different functions and different names. For example, in the central Javanese gamelan, the largest gong is called gong ageng , ranges in size up to 1 meter in diameter, has

655-647: A series of military campaigns to quell the Xiongnu. The Xiongnu were eventually defeated and forced to accept a status as Han vassals , and the Xiongnu confederation fragmented. The Han conquered the Hexi Corridor and Inner Asian territory of the Tarim Basin from the Xiongnu, helping to establish the Silk Road . The lands north of the Han's borders were later overrun by the nomadic Xianbei confederation. Emperor Wu also launched successful conquests in

786-563: A staff with the same treble and bass clefs used by many non-percussive instruments. Music for percussive instruments without a definite pitch can be notated with a specialist rhythm or percussion-clef . The guitar also has a special "tab" staff. More often a bass clef is substituted for rhythm clef. Percussion instruments are classified by various criteria sometimes depending on their construction, ethnic origin, function within musical theory and orchestration, or their relative prevalence in common knowledge. The word percussion derives from

917-595: A Greek sailor had visited. Emperor Zhang 's ( r.  75–88 AD ) reign came to be viewed by later Eastern Han scholars as the high point of the dynastic house. Subsequent reigns were increasingly marked by eunuch intervention in court politics and their involvement in the violent power struggles of the imperial consort clans . In 92 AD, with the aid of the eunuch Zheng Zhong ( d.  107 AD ), Emperor He ( r.  88–105 AD ) had Empress Dowager Dou ( d.  97 AD ) put under house arrest and her clan stripped of power. This

1048-463: A change which debased the value of coinage. Although these reforms provoked considerable opposition, Wang's regime met its ultimate downfall with the massive floods of c.  3  AD and 11 AD. Gradual silt build-up in the Yellow River had raised its water level and overwhelmed the flood control works . The Yellow River split into two new branches: one emptying to the north and

1179-448: A coalition of former officials and officers against Dong, who burned Luoyang to the ground and resettled the court at Chang'an in May 191 AD. Dong Zhuo later poisoned Emperor Shao. Dong was killed by his adopted son Lü Bu ( d.  198 AD ) in a plot hatched by Wang Yun ( d.  192 AD ). Emperor Xian fled from Chang'an in 195 AD to the ruins of Luoyang. Xian

1310-421: A cord passed through holes near to the top rim. Bossed or nipple gongs have a raised centre boss or knob and are often suspended and played horizontally. Bowl gongs are bowl-shaped and rest on cushions. The latter may be considered a member of the bell category. Gongs are made mainly from bronze or brass , though there are many other alloys in use. Gongs produce two distinct types of sound. A gong with

1441-416: A coup against the eunuchs Hou Lan ( d.  172 AD ), Cao Jie ( d.  181 AD ), and Wang Fu ( 王甫 ). When the plot was uncovered, the eunuchs arrested Empress Dowager Dou ( d.  172 AD ) and Chen Fan. General Zhang Huan ( 張奐 ) favoured the eunuchs. He and his troops confronted Dou Wu and his retainers at the palace gate where each side shouted accusations of treason against

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1572-527: A descendant of Emperor Jing ( r.  157–141 BC ), attempted to restore the Han dynasty and occupied Chang'an as his capital. However, he was overwhelmed by the Red Eyebrow rebels who deposed, assassinated, and replaced him with the puppet monarch Liu Penzi . Gengshi's distant cousin Liu Xiu, known posthumously as Emperor Guangwu ( r.  25–57 AD ), after distinguishing himself at

1703-429: A distinctive sound. It is not uncommon to discuss percussion instruments in relation to their cultural origin. This led to a division between instruments considered common or modern, and folk instruments with significant history or purpose within a geographic region or culture. This category includes instruments that are widely available and popular throughout the world: The percussionist uses various objects to strike

1834-526: A foreign instrument that came from a country between Tibet and Burma. The term gong ( Javanese : ꦒꦺꦴꦁ ) originated in the Indonesian island of Java . Scientific and archaeological research has established that Annam , Java , Burma , and Southern China were the four main gong manufacturing centres of the ancient world. The gong found its way into the Western World in the 18th century, when it

1965-626: A musical instrument and a work of visual art. They are generally not disc shaped, but instead take more complex, even abstract forms. Sculptural gongs were pioneered in the early 1990s by Welsh percussionist and metal crafter, Steve Hubback, who was partially inspired by the work of the French Sound Sculptors, Francois and Bernard Baschet . Hubback's works have been used by many musicians including solo percussionist Dame Evelyn Glennie and rock drummer Carl Palmer . English gong and cymbal maker , Matt Nolan , partially inspired by

2096-664: A number of limited institutional innovations. To finance its military campaigns and the settlement of newly conquered frontier territories, the Han government nationalised private salt and iron industries in 117 BC, creating government monopolies that were later repealed during the Eastern period. There were significant advances in science and technology during the Han period, including the emergence of papermaking , rudders for steering ships, negative numbers in mathematics , raised-relief maps , hydraulic -powered armillary spheres for astronomy , and seismometers that discerned

2227-410: A nylon tip drumstick they sound rather like the coil chimes in a mantle clock. Some have holes in the centre, but they are mounted like all suspended gongs by other holes near the rim. The smaller sizes, 7 to 12 inches (18 to 30 cm), have a more bell-like tone due to their thickness and small diameter. Sculptural gongs (also known as Gong Sculptures) are gongs which serve the dual purpose of being

2358-506: A pair 1 or 2 inches (3 or 5 cm) larger than the smaller. A Pasi gong is a medium-size gong 12 to 15 inches (30 to 38 cm) in size, with a loud crashing sound. It is used traditionally to announce the start of a performance, play or magic. Construction varies, some having nipples and some not, so this type is named more for its function than for its structure or even its sound. Pasi gongs without nipples have found favour with adventurous middle-of-the-road kit drummers. A tiger gong

2489-464: A percussion instrument to produce sound. The general term for a musician who plays percussion instruments is "percussionist" but the terms listed below often describe specialties: Within rock music, the term "percussionist" is often used to refer to someone who plays percussion instruments but is not primarily a drummer. The term is especially found in bands where one person plays drums and another plays other hit instruments. Han dynasty This

2620-423: A pivotal role. In military marching bands and pipes and drums , it is the beat of the bass drum that keeps the soldiers in step and at a regular speed, and it is the snare that provides that crisp, decisive air to the tune of a regiment. In classic jazz, one almost immediately thinks of the distinctive rhythm of the hi-hats or the ride cymbal when the word-swing is spoken. In more recent popular-music culture, it

2751-578: A request by Kushan ruler Vima Kadphises ( r.   c.  90  – c.  100 AD –  ) for a marriage alliance with the Han was rejected in AD ;90, he sent his forces to Wakhan (modern-day Afghanistan) to attack Ban Chao. The conflict ended with the Kushans withdrawing because of lack of supplies. In AD 91, the office of Protector General of the Western Regions

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2882-415: A round, hard, leather-covered pad that is fitted on a short stick or handle. It emits a peculiarly sonorous sound which can be varied by particular ways of striking the disk. Its complex vibrations burst into a wave-like succession of tones that can be either shrill or deep. In China and Japan gongs are used in religious ceremonies, state processions, marriages and other festivals. The gong has been used in

3013-428: A series of reforms that limited the power of these kingdoms in 145, dividing their former territories into new commanderies under central control. Kings were no longer able to appoint their own staff; this duty was assumed by the imperial court. Kings became nominal heads of their fiefs and collected a portion of tax revenues as their personal incomes. The kingdoms were never entirely abolished and existed throughout

3144-460: A shorter delay for the sound to "bloom". Keeping this priming stroke inaudible calls for a great deal of skill. The smallest suspended gongs are played with bamboo sticks or even western-style drumsticks. Contemporary and avant-garde music, where different sounds are sought, will often use friction mallets (producing squeals and harmonics), bass bows (producing long tones and high overtones), and various striking implements (wood/plastic/metal) to produce

3275-431: A substantially flat surface vibrates in multiple modes, giving a "crash" rather than a tuned note. This category of gong is sometimes called a tam-tam , to distinguish it from the bossed gongs that give a tuned note. In Indonesian gamelan ensembles, some bossed gongs are deliberately made to generate an additional beat note in the range from about 1 to 5 Hz. The use of the term "gong" for both these types of instrument

3406-545: A successful overthrow of her regime to enthrone Emperor Shun of Han ( r.  125–144 AD ). Yan was placed under house arrest, her relatives were either killed or exiled, and her eunuch allies were slaughtered. The regent Liang Ji ( d.  159 AD ), brother of Empress Liang Na ( d.  150 AD ), had the brother-in-law of Consort Deng Mengnü ( d.  165 AD ) killed after Deng Mengnü resisted Liang Ji's attempts to control her. Afterward, Emperor Huan employed eunuchs to depose Liang Ji, who

3537-452: A tub of water after being struck. This is called "water gong" and is called for in several orchestral pieces. Tuned gongs have also been used with the symphony orchestra, e.g. sets of differently tuned gongs used by Messiaen in pieces such as Des canyons aux étoiles and Et exspecto resurrectionem mortuorum . Gongs are also used as signal devices in a number of applications. A bowl-shaped, center mounted, electrically controlled gong

3668-408: A very narrow up-down triangle at 21–24% tin content and 780 °C (1,440 °F) symbolized by β. This is the secret of all past bronze instrument making. When bronze is mixed and heated, it glows orange-red which indicates it has been heated to the beta phase borders where the metal needs to be submerged in cold water to lock the alloy in the beta phase for cymbal making. The gong is then beaten with

3799-474: A war to determine who would have hegemony over China, which had fissured into Eighteen Kingdoms , each claiming allegiance to either Xiang Yu or Liu Bang. Although Xiang Yu proved to be an effective commander, Liu Bang defeated him at the Battle of Gaixia (202 BC) in modern-day Anhui . Liu Bang assumed the title of Emperor at the urging of his followers and is known posthumously as Emperor Gaozu ( r.  202–195 BC ). Chang'an (modern Xi'an)

3930-442: A warning bell. Mechanical bells, known in some places as a gong, are struck by an electric-powered hammer to audibly warn motorists and pedestrians of an oncoming train. Many railroad crossing gongs are now being replaced by electronic devices with no moving parts. Gongs are present on rail vehicles , such as trams, streetcars , trains, cable cars or light rail trains, in the form of a bowl-shaped signal bell typically mounted on

4061-426: A wind gong is played with a large soft mallet, which gives it a roaring crash to match their namesake. They are lathed on both sides and are medium to large in size, typically 15 to 22 inches (38 to 56 cm) but sizes from 7 to 60 inches (18 to 152 cm) are available. The 22-inch (56 cm) size is most popular due to its portability and large sound. They are commonly used by drummers in rock music. Played with

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4192-405: Is a pair of gongs, the larger with a descending tone, the smaller with a rising tone. The larger gong is used to announce the entrance of major players or men and to identify points of drama and consequence. The smaller gong is used to announce the entry of lesser players or women and to identify points of humour . Opera gongs range in size from 7 to 12 inches (18 to 30 cm), with the larger of

4323-546: Is a slightly descending or less commonly ascending gong, larger than an opera gong and with a less pronounced pitch shift. Most commonly 15 inches (38 cm) but available down to 8 inches (20 cm). A Shueng Kwong gong is a medium to large gong with a sharp staccato sound. Wind gongs (also known as Feng or Lion Gongs) are flat bronze discs, with little fundamental pitch, heavy tuned overtones, and long sustain. They are most commonly made of B20 bronze, but can also be made of M63 brass or NS12 nickel-silver . Traditionally,

4454-437: Is almost impossible to name three or four rock, hip-hop, rap, funk or even soul charts or songs that do not have some sort of percussive beat keeping the tune in time. Because of the diversity of percussive instruments, it is not uncommon to find large musical ensembles composed entirely of percussion. Rhythm, melody, and harmony are all represented in these ensembles. Music for pitched percussion instruments can be notated on

4585-623: Is an accepted version of this page The Han dynasty was an imperial dynasty of China (202 BC – 9 AD, 25–220 AD) established by Liu Bang and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–206 BC) and a warring interregnum known as the Chu–Han Contention (206–202 BC), and it was succeeded by the Three Kingdoms period (220–280 AD). The dynasty

4716-401: Is common. Suspended gongs are played with hammers and are of two main types: flat faced discs, either with or without a turned edge and gongs with a raised centre boss. In general, the larger the gong, the larger and softer the hammer. In Western symphonic music, the flat faced gongs are generally referred to as tam-tams to distinguish them from their bossed counterparts. Here, the term "gong"

4847-427: Is commonly referred to as "the backbone" or "the heartbeat" of a musical ensemble , often working in close collaboration with bass instruments, when present. In jazz and other popular music ensembles, the pianist, bassist, drummer and sometimes the guitarist are referred to as the rhythm section . Most classical pieces written for full orchestra since the time of Haydn and Mozart are orchestrated to place emphasis on

4978-421: Is difficult to define what is common knowledge but there are instruments percussionists and composers use in contemporary music that most people would not consider musical instruments . It is worthwhile to try to distinguish between instruments based on their acceptance or consideration by a general audience. For example, most people would not consider an anvil , a brake drum (on a vehicle with drum brakes ,

5109-589: Is discernible. Percussion instruments in this group are sometimes referred to as pitched or tuned. Examples of percussion instruments with definite pitch: Instruments in this group are sometimes referred to as non-pitched, unpitched, or untuned. Traditionally these instruments are thought of as making a sound that contains such complex frequencies that no discernible pitch can be heard. In fact many traditionally unpitched instruments, such as triangles and even cymbals, have also been produced as tuned sets. Examples of percussion instruments with indefinite pitch: It

5240-506: Is from the details on the surface of the Ngọc Lũ I bronze drum (c. 3rd to 2nd century BC) from the Dong Son culture of northern Vietnam . It depicts what looks like seven-gong ensembles along with other instruments (including cymbals/bells and the bronze drums themselves). The oldest undisputed historical mention of gongs can be found in sixth century AD Chinese records, which mentioned it as

5371-433: Is made of copper-based alloy, bronze, or brass. It is almost flat except for the rim, which is turned up to make a shallow cylinder. On a 10-inch (25 cm) gong, for example, the rim extends about 1 ⁄ 2 inch (1 cm) perpendicular to the surface. The main surface is slightly concave when viewed from the direction to which the rim is turned. The centre spot and rim of a chau gong are left coated on both sides with

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5502-493: Is now northern Sichuan and southern Shaanxi , was not quelled until 215 AD. Zhang Jue's massive rebellion across eight provinces was annihilated by Han forces within a year; however, the following decades saw much smaller recurrent uprisings. Although the Yellow Turbans were defeated, many generals appointed during the crisis never disbanded their assembled militias and used these troops to amass power outside of

5633-500: Is produced by a stream of air being blown through the object. However, plosive aerophones , such as the udu , are percussion instruments and may also overlap with the idiophone family. In certain situations, such as in an orchestra or wind ensemble , wind instruments, such as the Acme siren or various whistles , are played by percussionists, owing to their unconventional and simple nature. When classifying instruments by function it

5764-602: Is recorded in the Weilüe and Book of Later Han to have reached the court of Emperor Huan of Han ( r.  146–168 AD ) in AD 166, yet Rafe de Crespigny asserts that this was most likely a group of Roman merchants . In addition to Roman glasswares and coins found in China, Roman medallions from the reign of Antoninus Pius and his adopted son Marcus Aurelius have been found at Óc Eo in Vietnam. This

5895-411: Is reserved for the bossed type only. The gong has been a Chinese instrument for millennia. Its first use may have been to signal peasant workers in from the fields, because some gongs are loud enough to be heard from up to 5 miles (8 km) away. Large flat gongs may be 'primed' by lightly hitting them before the main stroke, greatly enhancing the sound and causing the instrument to "speak" sooner, with

6026-486: Is standard equipment in a boxing ring . Commonly referred to as the gong , it is struck with a hammer to signal the start and end of each round. During the Victorian and Edwardian eras, it was often the custom in hotels, on ships and in large, upper-class houses to sound a dinner gong to announce a meal was about to be served. A railroad crossing with a flashing traffic signal or wigwag will also typically have

6157-440: Is useful to note if a percussion instrument makes a definite pitch or indefinite pitch . For example, some percussion instruments such as the marimba and timpani produce an obvious fundamental pitch and can therefore play melody and serve harmonic functions in music. Other instruments such as crash cymbals and snare drums produce sounds with such complex overtones and a wide range of prominent frequencies that no pitch

6288-501: Is widely seen as inadequate. Rather, it may be more informative to describe percussion instruments in regards to one or more of the following four paradigms: Many texts, including Teaching Percussion by Gary Cook of the University of Arizona, begin by studying the physical characteristics of instruments and the methods by which they can produce sound. This is perhaps the most scientifically pleasing assignment of nomenclature whereas

6419-654: Is widely used in Buddhist memorial services, hayashi performances, kabuki music, and ship departure signals. A nipple gong has a central raised boss or nipple, often made of different metals than other gongs with varying degrees of quality and resonance. They have a tone with less shimmer than other gongs, and two distinct sounds depending on whether they are struck on the boss or next to it. They are most often but not always tuned to various pitches. Nipple gongs range in size from 6 to 20 inches (15 to 51 cm) or larger. Sets of smaller, tuned nipple gongs can be used to play

6550-538: The Battle of Kunyang in 23 AD, was urged to succeed Gengshi as emperor. Under Guangwu's rule, the Han Empire was restored. Guangwu made Luoyang his capital in 25 AD, and by 27 his officers Deng Yu and Feng Yi had forced the Red Eyebrows to surrender and executed their leaders for treason . From 26 until 36 AD, Emperor Guangwu had to wage war against other regional warlords who claimed

6681-462: The Battle of Zhizhi , in modern Taraz , Kazakhstan. In 121 BC, Han forces expelled the Xiongnu from a vast territory spanning the Hexi Corridor to Lop Nur . They repelled a joint Xiongnu- Qiang invasion of this northwestern territory in 111 BC. In that same year, the Han court established four new frontier commanderies in this region to consolidate their control: Jiuquan , Zhangyi , Dunhuang , and Wuwei . The majority of people on

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6812-743: The Buyeo Kingdom in Manchuria to the Ili River of the Wusun people. The Xianbei reached their apogee under Tanshihuai ( d.  AD 181 ), who consistently defeated Chinese armies. However, Tanshihuai's confederation disintegrated after his death. Ban Chao ( d.  AD 102 ) enlisted the aid of the Kushan Empire , which controlled territory across South and Central Asia, to subdue Kashgar and its ally Sogdiana. When

6943-756: The Chu–Han Contention , the resulting Han dynasty was named after the Hanzhong fief. China's first imperial dynasty was the Qin dynasty (221–207 BC). The Qin united the Chinese Warring States by conquest, but their regime became unstable after the death of the first emperor Qin Shi Huang . Within four years, the dynasty's authority had collapsed in a rebellion. Two former rebel leaders, Xiang Yu ( d.  202 BC ) of Chu and Liu Bang ( d.  195 BC ) of Han , engaged in

7074-707: The Greco-Bactrian Kingdom ); he also gathered information on Shendu (the Indus River valley) and Anxi (the Parthian Empire ). All of these countries eventually received Han embassies. These connections marked the beginning of the Silk Road trade network that extended to the Roman Empire , bringing goods like Chinese silk and Roman glasswares between the two. From c.  115 BC until c.  60 BC , Han forces fought

7205-638: The Xiongnu , who were estranged from Han until their leader Bi ( 比 ), a rival claimant to the throne against his cousin Punu ( 蒲奴 ), submitted to Han as a tributary vassal in AD 50. This created two rival Xiongnu states: the Southern Xiongnu led by Bi, an ally of Han, and the Northern Xiongnu led by Punu, an enemy of Han. During the turbulent reign of Wang Mang, China lost control over

7336-575: The Yellow Turban Rebellion and Five Pecks of Rice Rebellion in 184 AD, largely because the court did not want to continue to alienate a significant portion of the gentry class who might otherwise join the rebellions. The Yellow Turbans and Five-Pecks-of-Rice adherents belonged to two different hierarchical Taoist religious societies led by faith healers Zhang Jue ( d.  184 AD ) and Zhang Lu ( d.  216 AD ), respectively. Zhang Lu's rebellion, in what

7467-532: The cosmology of later scholars such as Dong Zhongshu . The Han dynasty oversaw periods of economic prosperity as well as significant growth in the money economy that had first been established during the Zhou dynasty ( c.  1050  – 256 BC). The coinage minted by the central government in 119 BC remained the standard in China until the Tang dynasty (618–907 AD). The period saw

7598-481: The strings , woodwinds , and brass . However, often at least one pair of timpani is included, though they rarely play continuously. Rather, they serve to provide additional accents when needed. In the 18th and 19th centuries, other percussion instruments (like the triangle or cymbals ) have been used, again generally sparingly. The use of percussion instruments became more frequent in the 20th century classical music. In almost every style of music, percussion plays

7729-435: The timpani , snare drum , bass drum , tambourine , belonging to the membranophones, and cymbals and triangle , which are idiophones. However, the section can also contain aerophones, such as whistles and sirens , or a blown conch shell. Percussive techniques can even be applied to the human body itself, as in body percussion . On the other hand, keyboard instruments , such as the celesta , are not normally part of

7860-448: The " Han people " or "Han Chinese". The spoken Chinese and written Chinese are referred to respectively as the "Han language" and " Han characters ". The Han emperor was at the pinnacle of Han society and culture . He presided over the Han government but shared power with both the nobility and the appointed ministers who came largely from the scholarly gentry class . The Han Empire

7991-567: The 20th century. Paiste is the largest non-Asian manufacturer of gongs. This Swiss company of Estonian lineage makes gongs at their German factory. Also in Germany, Oetken Gongs, founded in 2011 by Broder Oetken-former Paiste gong master-offers his own range of gongs. He also built the first generation of Symphonic and Planetary gongs for Meinl . Italian company UFIP make a range of gongs at their factory in Pistoia . Michael Paiste, outside of

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8122-452: The Han as equal partners in a royal marriage alliance, but the Han were forced to send large amounts of tribute items such as silk clothes, food, and wine to the Xiongnu. Despite the tribute and negotiation between Laoshang Chanyu ( r.  174–160 BC ) and Emperor Wen ( r.  180–157 BC ) to reopen border markets, many of the Chanyu 's subordinates chose not to obey

8253-726: The Imperial University on a dubious charge of treason. In 167 AD, the Grand Commandant Dou Wu ( d.  168 AD ) convinced his son-in-law, Emperor Huan, to release them. However, the emperor permanently barred Li Ying and his associates from serving in office, marking the beginning of the Partisan Prohibitions . Following Huan's death, Dou Wu and the Grand Tutor Chen Fan ( d.  168 AD ) attempted

8384-455: The Latin verb percussio to beat, strike in the musical sense, and the noun percussus , a beating. As a noun in contemporary English, Wiktionary describes it as the collision of two bodies to produce a sound. The term is not unique to music, but has application in medicine and weaponry, as in percussion cap . However, all known uses of percussion appear to share a similar lineage beginning with

8515-693: The Tarim Basin, which was conquered by the Northern Xiongnu in AD 63 and used as a base to invade the Hexi Corridor in Gansu . Dou Gu ( d.  88 AD ) defeated the Northern Xiongnu at the Battle of Yiwulu in AD 73, evicting them from Turpan and chasing them as far as Lake Barkol before establishing a garrison at Hami. After the new Protector General of the Western Regions Chen Mu ( d.  AD 75 )

8646-514: The Xiongnu court to flee north of the Gobi Desert , and Han forces reached as far north as Lake Baikal . After Wu's reign, Han forces continued to fight the Xiongnu. The Xiongnu leader Huhanye ( r.  58–31 BC ) finally submitted to the Han as a tributary vassal in 51 BC. Huhanye's rival claimant to the throne, Zhizhi Chanyu ( r.  56–36 BC ), was killed by Han forces under Chen Tang and Gan Yanshou ( 甘延壽 ) at

8777-482: The Xiongnu over control of the oasis city-states in the Tarim Basin. The Han was eventually victorious and established the Protectorate of the Western Regions in 60 BC, which dealt with the region's defence and foreign affairs. The Han also expanded southward . The naval conquest of Nanyue in 111 BC expanded the Han realm into what are now modern Guangdong , Guangxi , and northern Vietnam. Yunnan

8908-546: The Yuan brothers, Zhang committed suicide by jumping into the Yellow River. General Dong Zhuo ( d.  192 AD ) found the young emperor and his brother wandering in the countryside. He escorted them safely back to the capital and was made Minister of Works , taking control of Luoyang and forcing Yuan Shao to flee. After Dong Zhuo demoted Emperor Shao and promoted his brother Liu Xie as Emperor Xian, Yuan Shao led

9039-692: The black copper oxide that forms during manufacture; the rest is polished to remove this coating. Chau gongs range in size from 7 to 80 inches (18 to 203 cm) in diameter. The earliest Chau gong is from a tomb discovered at the Guixian site in the Guangxi Zhuang Autonomous Region of China. It dates from the early Western Han dynasty . Gongs are depicted in Chinese visual art as of the 6th century CE, and were known for their very intense and spiritual drumming in rituals and tribal meetings. Traditionally, chau gongs were used to clear

9170-528: The capital was moved eastward to Luoyang. The era from his reign until the fall of Han is known as the Eastern Han or Later Han (25–220 AD). The Eastern Han ( traditional Chinese : 東漢 ; simplified Chinese : 东汉 ; pinyin : Dōnghàn ), also known as the Later Han ( 後漢 ; 后汉 ; Hòuhàn ), formally began on 5 August AD 25, when Liu Xiu became Emperor Guangwu of Han . During

9301-491: The cardinal direction of distant earthquakes by use of inverted pendulums . The Han dynasty had many conflicts with the Xiongnu , a nomadic confederation centred in the eastern Eurasian steppe . The Xiongnu defeated the Han in 200 BC , prompting the Han to appease the Xiongnu with a policy of marriage alliance and payments of tribute, though the Xiongnu continued to raid the Han's northern borders. Han policy changed in 133 BC, under Emperor Wu , when Han forces began

9432-600: The circular hub the brake shoes press against), or a fifty-five gallon oil barrel musical instruments yet composers and percussionists use these objects. Percussion instruments generally fall into the following categories: One pre-20th century example of found percussion is the use of cannon usually loaded with blank charges in Tchaikovsky 's 1812 Overture . John Cage , Harry Partch , Edgard Varèse , and Peter Schickele , all noted composers, created entire pieces of music using unconventional instruments. Beginning in

9563-434: The collapsing imperial authority. General-in-chief He Jin ( d.  189 AD ), half-brother to Empress He ( d.  189 AD ), plotted with Yuan Shao ( d.  202 AD ) to overthrow the eunuchs by having several generals march to the outskirts of the capital. There, in a written petition to Empress He, they demanded the eunuchs' execution. After a period of hesitation, Empress He consented. When

9694-406: The deepest pitch and is played least often; the next smaller gong is the gong suwukan or siyem , has a slightly higher pitch and replaces the gong ageng in pieces where gong strokes are close together; the kempul is smaller still, has a higher pitch, and is played more frequently. The gong ageng and some gong suwukan have a beat note. An essential part of the orchestra for Chinese opera

9825-449: The desired tones. Rock gongs are large stones struck with smaller stones to create a metallic resonating sound. By far the most familiar to most Westerners is the chau gong or bullseye gong . Large chau gongs, called tam-tams have become part of the symphony orchestra . Sometimes a chau gong is referred to as a Chinese gong , but in fact, it is only one of many types of suspended gongs that are associated with China. A chau gong

9956-499: The early 20th century perhaps with Ionisation by Edgard Varèse which used air-raid sirens among other things, composers began to require that percussionists invent or find objects to produce desired sounds and textures. Another example the use of a hammer and saw in Penderecki 's De Natura Sonoris No. 2 . By the late 20th century, such instruments were common in modern percussion ensemble music and popular productions, such as

10087-490: The emperor was often a minor, ruled over by a regent such as the empress dowager or one of her male relatives. Ranked immediately below the emperor were the kings who were of the same Liu family clan. The rest of society, including nobles lower than kings and all commoners excluding slaves, belonged to one of twenty ranks ( ershi gongcheng 二十公乘 ). Each successive rank gave its holder greater pensions and legal privileges. The highest rank, of full marquess , came with

10218-593: The empire . The Han dynasty came to an end in 220 AD when Cao Pi , king of Wei , usurped the throne from Emperor Xian . According to the Records of the Grand Historian , after the collapse of the Qin dynasty the hegemon Xiang Yu appointed Liu Bang as prince of the small fief of Hanzhong , named after its location on the Han River (in modern southwest Shaanxi ). Following Liu Bang's victory in

10349-489: The empresses and empresses dowager . Imperial authority was also seriously challenged by large Taoist religious societies which instigated the Yellow Turban Rebellion and the Five Pecks of Rice Rebellion . Following the death of Emperor Ling ( r.  168–189 AD ), the palace eunuchs were massacred by military officers, allowing members of the aristocracy and military governors to become warlords and divide

10480-640: The eunuchs discovered this, however, they had her brother He Miao ( 何苗 ) rescind the order. The eunuchs assassinated He Jin on 22 September 189. Yuan Shao then besieged Luoyang's Northern Palace while his brother Yuan Shu ( d.  199 AD ) besieged the Southern Palace. On September 25 both palaces were breached and approximately two thousand eunuchs were killed. Zhang Rang had previously fled with Emperor Shao ( r.  189 AD ) and his brother Liu Xie—the future Emperor Xian of Han ( r.  189–220 AD ). While being pursued by

10611-427: The family inheritance. His brothers Yuan Shang and Yuan Xi were killed in 207 AD by Gongsun Kang ( d.  221 AD ), who sent their heads to Cao Cao. After Cao's defeat at the naval Battle of Red Cliffs in 208 AD, China was divided into three spheres of influence, with Cao Cao dominating the north, Sun Quan (182–252 AD) dominating the south, and Liu Bei (161–223 AD) dominating

10742-593: The final of act 3 of Armida (1817), Bellini in Norma (1831) and Wagner in Rienzi (1842). Within a few decades the tam-tam became an important member of the percussion section of a modern symphony orchestra. It figures prominently in the symphonies of Peter Ilyich Tchaikovsky , Gustav Mahler , Dmitri Shostakovich and, to a lesser extent, Sergei Rachmaninov and Sergei Prokofiev . Giacomo Puccini used gongs and tam-tams in his operas. Igor Stravinsky greatly expanded

10873-408: The front of the leading car. It was designed to be sounded to act as a warning in areas where whistles and horns are prohibited, and the " clang of the trolley" refers to this sound. Traditionally, the gong was operated by a foot pedal, but is nowadays controlled by a button mounted on the driving panel. Early trams had a smaller gong with a bell pull mounted by the rear door of these railcars. This

11004-601: The frontier were soldiers. On occasion, the court forcibly moved peasant farmers to new frontier settlements, along with government-owned slaves and convicts who performed hard labour. The court also encouraged commoners, such as farmers, merchants, landowners, and hired labourers, to voluntarily migrate to the frontier. Even before the Han's expansion into Central Asia, diplomat Zhang Qian 's travels from 139 to 125 BC had established Chinese contacts with many surrounding civilizations. Zhang encountered Dayuan ( Fergana ), Kangju ( Sogdiana ), and Daxia ( Bactria , formerly

11135-421: The gong has all of the qualities and timbre of the Chinese instruments. The composition of the alloy of bronze used for making gongs is stated to be as follows: 76.52% Cu, 22.43% Sn, 0.26% Pb, 0.23% Zn, 0.81% Fe. In Turkish Cymbal making there is also sulfur and silicon in the alloy. Turkish Cymbals and Gamelan Gongs share beta phase bronze as a metallurgical roots. Tin and copper mix phase transition graphs show

11266-544: The hand or by a percussion mallet , such as the hang , gongs and the xylophone , but not drums and only some cymbals . 21 Struck drums , includes most types of drum, such as the timpani, snare drum, and tom-tom. 412.12 Percussion reeds , a class of wind instrument unrelated to percussion in the more common sense There are many instruments that have some claim to being percussion, but are classified otherwise: Percussion instruments are sometimes classified as pitched or unpitched. While valid, this classification

11397-680: The larger family business, makes gongs independently in Lucerne, Switzerland . Other independent gong manufacturers in Europe include Welshman Steve Hubback, currently based in the Netherlands; Matt Nolan and Michal Milas in the UK; Barry Mason in the UK; and Joao Pais-Filipe in Portugal. In North America, Sabian make a small number of gongs and Zildjian sell Zildjian-branded gongs which have in

11528-447: The largest instrument of the type, or for surrogate instruments such as the gong komodong or gong bumbung (blown gong) which fill the same musical function in ensembles lacking the large gong. In Balinese usage, gong refers to Gamelan Gong Kebyar . Besides many traditional and centuries old manufacturers all around China, including Tibet , as well as Burma , Java and Annam gongs have also been made in Europe and America since

11659-419: The membrane or head is struck with a hand, mallet, stick, beater, or improvised tool. Examples of membranophones: Most instruments known as chordophones are defined as string instruments , wherein their sound is derived from the vibration of a string, but some such as these examples also fall under percussion instruments. Most instruments known as aerophones are defined as wind instruments whereby sound

11790-459: The nobility, Wang Mang claimed on 10 January that the divine Mandate of Heaven called for the end of the Han dynasty and the beginning of his own: the Xin dynasty (9–23 AD). Wang Mang initiated a series of major reforms that were ultimately unsuccessful. These reforms included outlawing slavery, nationalizing and equally distributing land between households, and introducing new currencies,

11921-408: The off-Broadway show, Stomp . Rock band Aerosmith used a number of unconventional instruments in their song Sweet Emotion , including shotguns , brooms, and a sugar bag. The metal band Slipknot is well known for playing unusual percussion items, having two percussionists in the band. Along with deep sounding drums, their sound includes hitting baseball bats and other objects on beer kegs to create

12052-563: The orchestra to intensify the impression of fear and horror in melodramatic scenes and usually, but not exclusively, players interpret the term to call for a tam-tam , as noted above . The tam-tam was first introduced into a western orchestra by François-Joseph Gossec in the funeral march composed at the death of Mirabeau in 1791. Gaspare Spontini used the tam-tam in La Vestale's (1807) Act II finale. Berlioz called for four tam-tams in his Grande Messe des morts of 1837. The tam-tam

12183-459: The original Latin percussus. In a musical context then, the percussion instruments may have been originally coined to describe a family of musical instruments including drums, rattles, metal plates, or blocks that musicians beat or struck to produce sound. The Hornbostel–Sachs system has no high-level section for percussion . Most percussion instruments as the term is normally understood are classified as idiophones and membranophones . However

12314-436: The other paradigms are more dependent on historical or social circumstances. Based on observation and experimentation, one can determine how an instrument produces sound and then assign the instrument to one of the following four categories: "Idiophones produce sounds through the vibration of their entire body." Examples of idiophones: Most objects commonly known as drums are membranophones. Membranophones produce sound when

12445-687: The other to the south of the Shandong Peninsula , though Han engineers managed to dam the southern branch by 70 AD. The flood dislodged thousands of peasant farmers, many of whom joined roving bandit and rebel groups such as the Red Eyebrows to survive. Wang Mang's armies were incapable of quelling these enlarged rebel groups. Eventually, an insurgent mob forced their way into the Weiyang Palace and killed Wang Mang. The Gengshi Emperor ( r.  23–25 AD ),

12576-560: The other. When the retainers gradually deserted Dou Wu, he was forced to commit suicide. Under Emperor Ling ( r.  168–189 AD ) the eunuchs had the partisan prohibitions renewed and expanded, while also auctioning off top government offices. Many affairs of state were entrusted to the eunuchs Zhao Zhong ( d.  189 AD ) and Zhang Rang ( d.  189 AD ) while Emperor Ling spent much of his time roleplaying with concubines and participating in military parades. The Partisan Prohibitions were repealed during

12707-499: The past been made by Zildjian, but current production looks to be Chinese in origin. Ryan Shelledy is an independent gong maker based in the Midwestern United States. Some of the smaller Turkish cymbal companies have also been seen to dabble in gongs but very much as a sideline to their core business of hand-hammered cymbals . Gongs vary in diameter from about 20 to 60 inches (50 to 150 cm). They are made of

12838-505: The percussion section, but keyboard percussion instruments such as the glockenspiel and xylophone (which do not have piano keyboards) are included. Percussion instruments are most commonly divided into two classes: pitched percussion instruments, which produce notes with an identifiable pitch , and unpitched percussion instruments, which produce notes or sounds in an indefinite pitch. Percussion instruments may play not only rhythm , but also melody and harmony . Percussion

12969-486: The playing techniques of the tam-tam in his The Rite Of Spring to include short, quickly damped notes, quick crescendos, and a triangle beater scraped across the front of the instrument. Karlheinz Stockhausen used a 60" Paiste tam-tam in his Momente . A dora is one of the Japanese Percussion instruments and an idiophone . It is made of bronze, brass or iron, and is suspended onto a dora stand. It

13100-603: The remainder of Western and Eastern Han. To the north of China proper , the nomadic Xiongnu chieftain Modu Chanyu ( r.  209–174 BC ) conquered various tribes inhabiting the eastern portion of the Eurasian Steppe . By the end of his reign, he controlled the Inner Asian regions of Manchuria , Mongolia , and the Tarim Basin , subjugating over twenty states east of Samarkand . Emperor Gaozu

13231-616: The salt and iron monopolies were eventually abolished in the early Eastern Han. The issuing of coinage remained a central government monopoly throughout the rest of the Han dynasty. The government monopolies were eventually repealed when a political faction known as the Reformists gained greater influence in the court. The Reformists opposed the Modernist faction that had dominated court politics in Emperor Wu's reign and during

13362-706: The sound of gongs have been installed in theatres (particularly those in the Czech Republic ) to gather the audience from the lounge to the auditorium before the show begins or proceeds after interlude. German radio stations use a gong sound for the time signal . In the Commonwealth, emergency vehicles were fitted with electric, manual, or vacuum operated Winkworth bell gongs in the time before Martin's horns became available or rotary sirens came into use Percussion The percussion section of an orchestra most commonly contains instruments such as

13493-479: The south , annexing Nanyue in 111 BC and Dian in 109 BC . He further expanded Han territory into the northern Korean Peninsula , where Han forces conquered Gojoseon and established the Xuantu and Lelang commanderies in 108 BC. After 92 AD, palace eunuchs increasingly involved themselves in the dynasty's court politics, engaging in violent power struggles between various consort clans of

13624-479: The subsequent regency of Huo Guang ( d.  68 BC ). The Modernists argued for an aggressive and expansionary foreign policy supported by revenues from heavy government intervention in the private economy. The Reformists, however, overturned these policies, favouring a cautious, non-expansionary approach to foreign policy, frugal budget reform, and lower tax-rates imposed on private entrepreneurs. Wang Zhengjun (71 BC – 13 AD)

13755-685: The term percussion is instead used at lower-levels of the Hornbostel–Sachs hierarchy, including to identify instruments struck with either a non sonorous object hand, stick, striker or against a non-sonorous object human body , the ground. This is opposed to concussion , which refers to instruments with two or more complementary sonorous parts that strike against each other and other meanings. For example: 111.1 Concussion idiophones or clappers , played in pairs and beaten against each other, such as zills and clapsticks . 111.2 Percussion idiophones , includes many percussion instruments played with

13886-433: The timbral range of the tam-tam by giving performance directions such as using a "well-rosined contrabass bow" to bow the tam-tam. This produced an eerie harmonic sound. Stockhausen created more interesting sounds using hand-held microphones and a wide range of scraping, tapping, rubbing, and beating techniques with unconventional implements such as plastic dishes, egg timers, and cardboard tubes. Gongs can also be immersed into

14017-461: The title of emperor; when these warlords were defeated, China reunified under the Han. The period between the foundation of the Han dynasty and Wang Mang's reign is known as the Western Han ( 西漢 ; 西汉 ; Xīhàn ) or Former Han ( 前漢 ; 前汉 ; Qiánhàn ) (206 BC – 9 AD). During this period the capital was at Chang'an (modern Xi'an ). From the reign of Guangwu

14148-472: The treaty and periodically raided Han territories south of the Great Wall for additional goods. In a court conference assembled by Emperor Wu ( r.  141–87 BC ) in 135 BC, the majority consensus of the ministers was to retain the heqin agreement. Emperor Wu accepted this, despite continuing Xiongnu raids. However, a court conference the following year convinced the majority that

14279-517: The war with Chu, Emperor Gaozu enfeoffed some of them as kings. By 196, the Han court had replaced all of these kings with royal Liu family members, with the lone exception of Changsha . The loyalty of non-relatives to the emperor was questioned, and after several insurrections by Han kings—with the largest being the Rebellion of the Seven States in 154—the imperial court began enacting

14410-409: The way for important officials and processions, much like a police siren today. Sometimes the number of strokes was used to indicate the seniority of the official. In this way, two officials meeting unexpectedly on the road would know before the meeting which of them should bow down before the other. The tam-tam was first introduced as an orchestral instrument by François-Joseph Gossec in 1790, and it

14541-487: The west. Cao Cao died in March 220 AD. By December his son Cao Pi (187–226 AD) had Emperor Xian relinquish the throne to him and is known posthumously as Emperor Wen of Wei . This formally ended the Han dynasty and initiated an age of conflict between the Three Kingdoms : Cao Wei , Eastern Wu , and Shu Han . In the hierarchical social order, the emperor was at the apex of Han society and government. However,

14672-411: The widespread rebellion against Wang Mang , the state of Goguryeo was free to raid Han's Korean commanderies ; Han did not reaffirm its control over the region until AD 30. The Trưng Sisters of Vietnam rebelled against Han in AD 40. Their rebellion was crushed by Han general Ma Yuan ( d.  AD 49 ) in a campaign from AD 42 to 43. Wang Mang renewed hostilities against

14803-415: The work of Hubback, also creates sculptural gongs of his own design or to private commission. UK based sculptor Barry Mason makes gongs in titanium and other elemental metals. In older Javanese usage and in modern Balinese usage, gong is used to identify an ensemble of instruments. In contemporary central Javanese usage, the term gamelan is preferred and the term gong is reserved for the gong ageng ,

14934-429: Was also taken up by Gaspare Spontini and Jean-François Le Sueur . Hector Berlioz deployed the instrument throughout his compositional career, and in his Treatise on Instrumentation he recommended its use "for scenes of mourning or for the dramatic depiction of extreme horror." Other composers who adopted the tam-tam in the opera house included Gioachino Rossini , Vincenzo Bellini , and Richard Wagner : Rossini in

15065-823: Was also used in the funeral music played when the remains of Napoleon were brought back to France in 1840. Meyerbeer made use of the instrument in the scene of the resurrection of the three nuns in Robert le diable. Four tam-tams are used at Bayreuth in Parsifal to reinforce the bell instruments although there is no indication given in the score. In more modern music, the tam-tam has been used by composers such as Karlheinz Stockhausen in Mikrophonie I (1964–65) and by George Crumb . in Makrokosmos III: Music For A Summer Evening (1974), Crumb expanded

15196-400: Was also used in the percussion section of a Western-style symphony orchestra . A form of bronze cauldron gong known as a resting bell was widely used in ancient Greece and Rome: for instance in the famous Oracle of Dodona , where disc gongs were also used. Gongs generally fall into three types: Suspended gongs are more or less flat, circular discs of metal suspended vertically by means of

15327-438: Was appointed regent as Marshall of State on 16 August under Emperor Ping ( r.   1 BC – 6 AD). When Ping died on 3 February 6 AD, Ruzi Ying ( d.  25 AD ) was chosen as the heir and Wang Mang was appointed to serve as acting emperor for the child. Wang promised to relinquish his control to Liu Ying once he came of age. Despite this promise, and against protest and revolts from

15458-589: Was briefly interrupted by the Xin dynasty (9–23 AD) established by the usurping regent Wang Mang , and is thus separated into two periods—the Western Han (202 BC – 9 AD) and the Eastern Han (25–220 AD). Spanning over four centuries, the Han dynasty is considered a golden age in Chinese history , and had a permanent impact on Chinese identity in later periods. The majority ethnic group of modern China refer to themselves as

15589-903: Was brought into the Han realm with the conquest of the Dian Kingdom in 109 BC, followed by parts of the Korean Peninsula with the Han conquest of Gojoseon and establishment of the Xuantu and Lelang commanderies in 108 BC. The first nationwide census in Chinese history was taken in 2 AD; the Han's total population was registered as comprising 57,671,400 individuals across 12,366,470 households. To pay for his military campaigns and colonial expansion, Emperor Wu nationalised several private industries. He created central government monopolies administered largely by former merchants . These monopolies included salt, iron, and liquor production, as well as bronze coinage . The liquor monopoly lasted only from 98 to 81 BC, and

15720-552: Was chosen as the new capital of the reunified empire under Han. At the beginning of the Western Han ( traditional Chinese : 西漢 ; simplified Chinese : 西汉 ; pinyin : Xīhàn ), also known as the Former Han ( 前漢 ; 前汉 ; Qiánhàn ), thirteen centrally-controlled commanderies —including the capital region—existed in the western third of the empire, while the eastern two-thirds were divided into ten semi-autonomous kingdoms . To placate his prominent commanders from

15851-490: Was convinced by the accusations of the eunuchs Li Run ( 李閏 ) and Jiang Jing ( 江京 ) that Deng and her family had planned to depose him. An dismissed Deng's clan members from office, exiled them, and forced many to commit suicide. After An's death, his wife, Empress Dowager Yan ( d.  126 AD ) placed the child Marquess of Beixiang on the throne in an attempt to retain power within her family. However, palace eunuch Sun Cheng ( d.  132 AD ) masterminded

15982-442: Was divided into areas directly controlled by the central government called commanderies , as well as a number of semi-autonomous kingdoms . These kingdoms gradually lost all vestiges of their independence, particularly following the Rebellion of the Seven States . From the reign of Emperor Wu ( r.  141–87 BC ) onward, the Chinese court officially sponsored Confucianism in education and court politics, synthesized with

16113-487: Was first empress, then empress dowager , and finally grand empress dowager during the reigns of the Emperors Yuan ( r.  49–33 BC ), Cheng ( r.  33–7 BC ), and Ai ( r.  7–1 BC ), respectively. During this time, a succession of her male relatives held the title of regent. Following the death of Ai, Wang Zhengjun's nephew Wang Mang (45 BC – 23 AD)

16244-446: Was in revenge for Dou's purging of the clan of his natural mother— Consort Liang —and then concealing her identity from him. After Emperor He's death, his wife Empress Deng Sui ( d.  121 AD ) managed state affairs as the regent empress dowager during a turbulent financial crisis and widespread Qiang rebellion that lasted from 107 to 118 AD. When Empress Dowager Deng died, Emperor An ( r.  106–125 AD )

16375-650: Was killed by allies of the Xiongnu in Karasahr and Kucha , the garrison at Hami was withdrawn. At the Battle of Ikh Bayan in AD 89, Dou Xian ( d.  AD 92 ) defeated the Northern Xiongnu chanyu who then retreated into the Altai Mountains . After the Northern Xiongnu fled into the Ili River valley in AD 91, the nomadic Xianbei occupied the area from the borders of

16506-664: Was near the commandery of Rinan where Chinese sources claim the Romans first landed, as well as embassies from Tianzhu in northern India in 159 and 161. Óc Eo is also thought to be the port city " Cattigara " described by Ptolemy in his Geography ( c.  150 AD ) as lying east of the Golden Chersonese ( Malay Peninsula ) along the Magnus Sinus (i.e. the Gulf of Thailand and South China Sea ), where

16637-567: Was operated by the conductor to notify the driver that it is safe to proceed. A vessel over 100 metres (330 ft) in length must carry a gong in addition to a bell and whistle, the volume of which is defined in the International Regulations for Preventing Collisions at Sea . A vessel at anchor or aground sounds the gong in the stern immediately after ringing a bell in her bows so as to indicate her length. Electromechanical, electromagnetic or electronic devices producing

16768-450: Was persuaded by Cao Cao (155–220 AD), then Governor of Yan Province in modern western Shandong and eastern Henan , to move the capital to Xuchang in 196 AD. Yuan Shao challenged Cao Cao for control over the emperor. Yuan's power was greatly diminished after Cao defeated him at the Battle of Guandu in 200 AD. After Yuan died, Cao killed Yuan Shao's son Yuan Tan (173–205 AD), who had fought with his brothers over

16899-595: Was reinstated when it was bestowed on Ban Chao. Foreign travellers to the Eastern Han empire included Buddhist monks who translated works into Chinese , such as An Shigao from Parthia, and Lokaksema from Kushan-era Gandhara . In addition to tributary relations with the Kushans, the Han empire received gifts from sovereigns in the Parthian Empire , as well as from kings in modern Burma and Japan . He also initiated an unsuccessful mission to Rome in AD 97 with Gan Ying as emissary. A Roman embassy of Emperor Marcus Aurelius ( r.  161–180 AD )

17030-413: Was then forced to commit suicide. Students from the imperial university organized a widespread student protest against the eunuchs of Emperor Huan's court. Huan further alienated the bureaucracy when he initiated grandiose construction projects and hosted thousands of concubines in his harem at a time of economic crisis. Palace eunuchs imprisoned the official Li Ying ( 李膺 ) and his associates from

17161-399: Was troubled about the abundant Han-manufactured iron weapons traded to the Xiongnu along the northern borders, and he established a trade embargo against the group. In retaliation, the Xiongnu invaded what is now Shanxi , where they defeated the Han forces at Baideng in 200 BC. After negotiations, the heqin agreement in 198 BC nominally held the leaders of the Xiongnu and

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