Introduction to 衡裢TUO: The mountain is extremely steep, and there is Laojun Hall halfway up the mountain. It was built according to a cave, half artificial and half natural. Unfortunately, the original temple was destroyed in the turmoil of the "Cultural Revolution". There is a natural cave called "Immortal Cave" at the back of the palace. The cave is about 10 meters deep and 5 meters wide. There is a spring in the cave with cool and sweet water all year round. It is said that Taishang Laojun once practiced here.