Introduction to Tai Chi Express Plaza with the Four Immortals Formation of Huai Yao: The square is located on the west side of Tai Chi South Road in Chenjiagou Scenic Area, corresponding to the Tai Chi Bagua Lost Formation. The square is a place for practicing Tai Chi in an ecological garden with plants and vegetation of the "Four Great Medicines" as the landscape, covering an area of ​​8,000 square meters.