Why is Quanzhou East West Tower locked?

In order to better protect cultural relics.

Quanzhou East West Pagoda is the tallest pair of stone pagodas in China, located in Kaiyuan Temple in Quanzhou, West Street, Quanzhou. Each floor of the East West Tower is embedded with the relief of Buddhist figures 16, and the two towers have a total of 160 relief. There are 40 Buddhist pictures, 48 pictures of flowers, birds and animals, 16 dwarfs on Mount Sumi. In order to better protect the East West Tower in Quanzhou, tourists are not allowed to visit it. Quanzhou East West Tower is locked.