The Huadong Valley or Hualien–Taitung Valley ( Chinese : 花東縱谷 ; pinyin : Huādōng Zònggǔ ; Wade–Giles : Hua-tung Tsung-ku ), also known as East Rift Valley , the Longitudinal Valley or as the Nakasendō Plain ( 中仙道平野 , Nakasendō Heiya ) during the era of Japanese rule , is a long and narrow valley located between the Central Mountain Range and the Coastal Mountain Range of eastern Taiwan , stretching about 180 km (110 mi) from Hualien City at the north to Taitung City at the south..
1-622: The valley is believed to be part of the northern terminus of the Philippine Mobile Belt , a complex collection of tectonic plate fragments and volcanic intrusions. The valley is formed by the alluvial plains of three large river systems , namely the Hualien River , Xiuguluan River and Beinan River , all of which flow into the Pacific Ocean . The Huadong Highway , a section of Provincial Highway No. 9 , runs
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