In which episode did the ape cross the sea?

The 20 th episode of the ape crossing the sea of righteousness appeared. There is a barrier between the two mountains in Jingziguan Moon Bay. Outside the pass is Qinchuan in 800 miles, and inside the pass is the open Central Plains. In ancient times, the roaring Danjiang River and the narrow ancient road were isomorphic here to build a pass. One person guarded it, and 10,000 people could not force it. This pass is the origin of Guan Guan.