How many tributaries are there in Nenjiang River?

Nenjiang River flows from the source to the southeast. Join Ergen River at about 1 km south of Shierzhan Forest Farm and turn south. It was originally called Nenjiang. The total length of the main stream is 65,438+0,370km, and the drainage area is 297,000km2. There are many tributaries on the right bank of Nenjiang River and few tributaries on the left bank. The tributaries on the left and right banks all originate from the branches of Daxing 'anling and Xiaoxing 'anling, and face southeast or southwest along the slopes of the two mountains. There are 32 Nenjiang rivers with 300 ~1000km2; 1000 ~ 5000 km2 contains11; Five of them are over 5000 square kilometers.