It's an underground passage. After entering, there are landscape paintings on one side, antique murals on the other, and there are two ways to go to the bottom. One is Xuanzang Courtyard, which shows Xuanzang's life. The other is Bodhisattva worship. Along the way, there are some Haha mirrors, emperors'statues and so on. The treasure hall that advertises is actually a display of sexual and cultural products, and it has to pay extra money, so it will not be seen. On the whole, it's not worth seeing unless you want to stay in summer.