I have been to Zhangye once. Although the old city of Zhangye is rather chaotic, the new area of Zhangye is really like a metropolis in the south of the Yangtze River. In fact, the old city is almost the same as Wuwei or Jiuquan, but Jiuquan has developed better in the past two years, with a larger population. Personally, Zhangye is better. In fact, on the whole, Jiuquan is the third largest city in Gansu Province.