Introduction to Yanyu Tower: Yanyu Tower is located on the island in the center of Nanhu Lake. It is the main building on the island in the center of the lake. It has now become a general name for the entire garden on the island. The main building of Yanyu Building has two floors, about 20 meters high, and a construction area of ​​more than 640 square meters. A plaque of "Misty Rain Building" written by Dong Biwu hangs on the front eaves of the building.