After the Chinese Civil War, the Kuomintang-led Republic of China government lost its control in Mainland China and only held several east coast islands off Mainland Chekiang Province, including Tachen, Ichiangshan (Yikiangshan), Pishan, Taumenshan, Yüshan and Nanki.
The river rises in forks in the southern part of the central Taiwan cordillera, several of which begin just south of Yushan.
The nearest airport is the Hongqiao Airport, around 55 km away in west Shanghai, with a driving distance of 45 mins from the Yushan town centre.
The Chenyoulan (陳有蘭溪), Jyunda (郡大溪), Nanzaisian (楠梓仙溪), Laonong (荖濃溪), and Lekuleku(拉庫拉庫溪) rivers are all young rivers from Yushan with V-shaped river bed.