Introduction to Yanglan Drum Tower: Yanglan Drum Tower is located at the entrance of Yanglan Village, Pingtan Township, 26 kilometers southwest of Tongtong County. It was built during the Qianlong period of the Qing Dynasty. It covers a total area of 242 square meters. It is a gate-style drum tower. It is mainly composed of It consists of four parts: gatehouse, main building, back building and corridor.