The square tower is one of the landmark buildings in Changshu. The tower towering above the clouds is a landmark building in the ancient city of Changshu. The square tower, formerly known as "Chongjiao Xingfu Temple Tower", is named for its four-dimensional appearance; the tower was built in the Southern Song Dynasty in Jianyan four years (1130 AD). It rained on the day I went, the pictures I took were not beautiful, and the weather would be better.