History of Zhangye

Zhangye lies in the centre of the Hexi Corridor. The area is on the frontier of China Proper, protecting it from the nomads of the northwest and permitting its armies access to the Tarim Basin. During the Han Dynasty, Chinese armies were often engaged against the Xiongnu in this area. It was also an important outpost on the Silk Road.[citation needed] Before being over-run by the Mongols, it was dominated by the Western Xia, and before by the Uyghurs from at least the early 10th century. Its relation to the larger Uyghur state of Qocho is obscure, but it may have been a vassal.

The Mongol Emperor Kublai Khan is said to have been born in the Dafo Temple, Zhangye, now the site of the longest wooden reclining Buddha in China.[citation needed] Marco Polo’s journal states that he spent a year in the town during his journey to China.

The pine forests of the Babao Mountains (part of the Qilian range) formerly regulated the flow of the Ruo or Hei Shui, Ganzhou’s primary river. By ensuring that the melt-waters lasted throughout the summer, they avoided both early flood and later drought for the valley’s farmers. Despite recommendations that they should thus be protected in perpetuity, an imperial official in charge of erecting the poles for China’s telegraph network ordered them cleared in the 1880s. Almost immediately, the region became prone to flooding in the summer and draught in the autumn, arousing local resentment.

Christian missionaries arrived in 1879, after Suzhou was found to be too hostile for their settlement.

Source From: https://en.wikipedia.org/wiki/Zhangye#History