The main line of Zhedong Canal is a canal in Zhejiang Province, China. It starts from Xixing Street in Binjiang District of Hangzhou City, crosses Cao"e River, passes through Shaoxing City, and flows to the mouth of Ningbo River in Ningbo to the east, with a total length of 239 kilometers. The original part of the canal was the Shanyin waterway in Shaoxing, which was built in the Spring and Autumn Period. During the Western Jin Dynasty, Huiji Neihe Hexu presided over the excavation of the Xixing Canal. Later, the east canal of Cao"e River formed a complete canal from the Qiantang River in the west to the East China Sea in the east. The canal from Xixing to Cao"e River is also known as the “Xiaoshao Canal”. The Southern Song Dynasty built the Lin"an, and the Zhedong Canal became an important shipping channel at that time. The role of the Zhedong Canal in history can be broadly divided into four parts: shipping, irrigation, transportation, and waterlogging. A large number of related cultural relics have been preserved along the Zhedong Canal. It includes 3 national key cultural relics protection units, nearly 20 provincial cultural relics protection units, and numerous city and county cultural relics protection units, mainly water conservancy facilities, bridges and other related facilities. In addition, there are also some ancient towns affected by the canal along the canal, such as Xixing Ancient Town.
Hangzhou Zhonghe-Longshan River The Jiangnan Canal extends from Hangzhou to a section of the Qiantang River. In the Northern Song Dynasty, in order to enable the Qiantang River to enter Hangzhou to connect to the South Canal, the Longshan River was treated and the gate was closed to the Qiantang River to prevent the river tide and regulate the water volume of the canal.