An inverted river, a trickling westward stream in China, originated in the Riyueshan Mountains and flowed into Qinghai Lake. Legend has it that Princess Wencheng's tears flowed into a river. Between the vast grasslands, like a rainbow in the rain, like a flowing star in the night sky, simple and beautiful. You can ride Yaks in the upside down river. The naive yak, without any temper, is very cute. There are no vendors and hawkers in the backflow scenic area. The scenic spot is quiet.