Introduction to Pinghu Cave: Pinghu Cave, there is water in the cave, and there are fish in the water. The fish have transparent bodies and are called glass fish. The water in the cave rises and falls at intervals, and there is no rhythm in time. The water in the cave can be used for boating. The upper reaches of the water are more than 200 meters. There are mountains in the water, which are made of accumulated earth and rocks. Bats in the cave live all year round.