What are the places on both sides of Songhua River?

The main source of Songhua River is 790 kilometers long, with a drainage area of 78,200 square kilometers. Many tributaries originate from Changbai Mountain, mostly from the left bank. The upper reaches flow through high mountains and canyons, with narrow rivers, fast-flowing water and abundant hydraulic resources. In Fengman, Jilin City, Fengman Reservoir (also known as Songhua Lake) with a capacity of10 billion cubic meters was formed by artificial dam construction. The lake area is about 200 kilometers long and is navigable for small passenger ships. The upstream hydraulic resources are being gradually developed in stages. The valley below Jilin City is gradually widened to 300 ~ 500m, the river surface below Fuyu County is about 500 ~ 1000m, and the river slope is only 0.095%. The water flow gradually slows down and the water depth increases to about 2.5m m. ..

The main stream of Songhua River is 867 kilometers long, and larger tributaries such as Lalin River, Hulan River, Mayi River, Mudanjiang River, Woken River and Tangwang River flow in turn. The main stream is deep and wide, with a gentle slope, which can be roughly divided into three sections: Sanchahe to Harbin, where the river meanders in the grassland wetland, with a width of about 370 ~ 850 meters and slow shallow water flow; From Harbin to Jiamusi, there are platforms and low hills on both sides, and the river is 200 ~ 1 000 meters wide, among which the "Three Surnames Shoal" near Yilan is 27 kilometers long, and there are many rocks exposed to the water at dangerous places, and there are continuous stone cliffs on the river bank, reaching more than 600 meters. Below Jiamusi, the terrain is flat and the river is wide and shallow, generally about 1.5 ~ 3 km wide. The flow rate is slow, supported by Heilongjiang water, and the backwater can be traced back more than 80 kilometers to Fujin. The average riverbed gradient is 0.083‰, of which the gradient from Sanchahe to Harbin is only 0.02 1‰.