The Sui Canal starts from the north and ends at Yuhang in the south, with a total length of more than 2,000 kilometers, with Luo as the center. It is divided into four sections: Yongji Canal, Tongji Canal, Shanyangdu (Hangou) and Jiangnan. It is one of the most magnificent projects in the world, connecting five major water systems: Yellow River, Yangtze River, Haihe River, Huaihe River and Qiantang River. The length of canals is second to none in the world, and the depth, width and length of rivers are also second to none. (Pi, author of Bian River Inscription). "Looking back on the past by the Bian River" (Pi Rixiu) said: "The road is long, and it is a river in Xiu Yuan." The Grand Canal, like the Great Wall, enjoys a high reputation in the world. It embodies the intelligence and creativity of the working people in ancient China. The opening of the canal promoted the development of the city, and Jiangdu, Yuhang and Zhuojun flourished rapidly. It has safeguarded national unity and promoted centralization and stability.