Heilongjiang is one of the great rivers in Asia, with a total length of 4,440 kilometers, which flows through Mongolia, China and Russia and is located in the northeast of Asia. There are two sources in Heilongjiang. The south source is the Ergon River, with a total length of 4,440 kilometers, which flows into the Okhotsk Strait in Nikolayevsk, Russia.

Length of the Yellow River: 5,464 kilometers, which is a big river in the north of China, with a total length of about 5,464 kilometers and a drainage area of about 752,443 square kilometers. The Yellow River originates from Zhaqu of ChaHasila Mountain in Bayan Kara Mountain in Qinghai, Kariqu at the northern foot, and Lequle of Yuegu Sect in the west of Haixi in Su Xing, showing a "few" shape. It flows from west to east through Qinghai, Sichuan, Gansu, Ningxia, Inner Mongolia, Shaanxi, Shanxi, Henan and Shandong provinces, and finally flows into the Bohai Sea.

The length of the Yangtze River: 6,300 kilometers, originating from the "roof of the world"-the southwest side of Gladden Peak in Tanggula Mountain on the Qinghai-Tibet Plateau. The main stream flows through Qinghai, Tibet, Sichuan, Yunnan, Chongqing, Hubei, Hunan, Jiangxi, Anhui, Jiangsu, Shanghai 1 1 provinces, autonomous regions and municipalities directly under the Central Government, and flows into the East China Sea east of Chongming Island, with a total length of about 6,300 kilometers.

Length of Pearl River: 22 14km. The Pearl River originates from Maxiong Mountain in Wumeng Mountain of Yunnan-Guizhou Plateau, flows through six provinces in central and western China and northern Vietnam, and flows into the South China Sea from eight downstream estuaries.