Introduction to the terminal: Yuxi River is also called Cao River or Yun Cao River. According to historical books, Cao River is the river for transporting grain. It was called Cao Yun in ancient times. The 76-kilometer-long Yuncao River connects Chaohu Lake at the top and the Yangtze River at the bottom. It is an important channel for the exchange of goods and trade between Jiangnan and Jiangbei, southern Anhui and western Anhui. It is also the only channel for Hefei to enter the Yangtze River from the Nanfei River through Chaohu.