The Beijing-Hangzhou Grand Canal, which was ordered by Emperor Yang of Sui Dynasty, has a total length of about 1,794 kilometers. It is the second "golden waterway" in China after the Yangtze River. It is listed as a world cultural heritage. The earliest and longest artificial river channel was dug, which is 16 times as long as the Suez Canal and 33 times as long as the Panama Canal.

The Beijing-Hangzhou Grand Canal flows through Tongzhou District of Beijing, Wuqing District of Tianjin, Langfang City, Cangzhou City, Hengshui City, Xingtai City of Hebei Province, Dezhou City, Linqing City, Liaocheng City, Jining City, Tengzhou City, Weishan City of Shandong Province County, Xuzhou City, Suqian City, Huai'an City, Yangzhou City, Zhenjiang City, Changzhou City, Wuxi City, Suzhou City in Jiangsu Province, Jiaxing City, Huzhou City, Hangzhou City in Zhejiang Province 20 urban areas, communicated with Haihe, Yellow River and Huaihe , the Yangtze River, and the five major water systems of the Qiantang River.

The canal that stretches for thousands of miles, the uneven terrain, and the continuous changes of the Huang, Huai and other rivers, how to ensure the smooth flow of the canal? Among them, water control ideas, technologies, and management have all played an important role.Editor/Ma Xue