Introduction to Haitang Valley: A section of the river valley at the mouth of Haitang Valley is called Qinhai. Standing on the Haitang Valley Bridge, the upstream of the river beach is a strange-shaped rock beach with fast currents, rough waves and swirling waves; downstream, the river surface is open, forming a natural beach , the huge rocks on the shore, some look like giant beasts, and some look like islands.