The Grand Canal in Tongzhou, Beijing is from Tongzhou District to Tianjin City.

The Grand Canal, a great project on the plains of eastern China, is a great water conservancy construction created by the ancient Chinese working people, the longest canal in the world, and the earliest and largest canal in the world.

The Grand Canal was built in 486 B.C., including the Sui and Tang Dynasty Grand Canal, Beijing-Hangzhou Grand Canal and Zhedong Grand Canal, with a total length of 2,700 kilometers, spanning more than 10 degrees of latitude on the earth, and eight provinces and municipalities, including Beijing, Tianjin, Hebei, Shandong, Henan, Anhui, Jiangsu and Zhejiang, and running through the great plains of North China,

The Grand Canal is accessible to five major water systems, namely, Haihe, Yellow River, Huaihe and Yangtze River, and Qiantang River, and is also the first canal in the world to have been excavated on the largest scale, Qiantang River, the five major water systems, is China's ancient north-south transportation artery, so far the history of the Grand Canal has continued for more than 2,500 years.

Expanded Information:

The Grand Canal serves as the main transportation artery between China's ancient north and south. p>The Grand Canal has served as an important channel for China's water transportation for more than 1,200 years. After the middle of the Qing Dynasty, the Northern Canal in Shandong was silted up. In the fifth year of the Daoguang period (1825), grain and rice from the south of the Yangtze River were transported by sea to Tianjin and then to Beijing.

The Grand Canal was gradually abolished after the opening of the Jinpu Railway in 1911. By 1949, the section of the river in Shandong and the Central Canal had become unnavigable. After 1949, the canal was completely renovated, locks and control gates were built, and new channels were opened to separate the river from the lake.

In the southern section of the Li Canal, a new channel was opened between Wapu and Liuxuigang, which shortened the voyage between the Li Canal and the Jiangnan Canal. The Central Canal was also dredged and reconstructed. To facilitate the southward transportation of coal from Xuzhou, a new channel was opened along the west side of Weishan Lake. Jiangnan Canal originally from the city of Zhenjiang into the river, due to the narrow channel silt, has been changed to Jianbi mouth into the river, in Jianbi built a large locks to control the water level.

The Beijing-Hangzhou Grand Canal, as the main transportation artery between the north and the south, has historically played a huge role in "half a day's wealth, all the way into this road". The navigation of the canal promoted the rapid development of the coastal cities.

Baidu Encyclopedia - Grand Canal