Introduction to Baocheng: Behind Qiyun Hall is Baocheng, which is horseshoe-shaped in plane, with a mooring in front and an octagonal arc-shaped wall at the back, 3.6 meters high. Baocheng is 18.7 meters long from north to south and 22.4 meters wide from east to west. It is divided into two levels of terraces, front and back. On the upper level, Xingzu, Zuo Zhaojingzu, and Youmu Xianzu are buried in the middle of the platform; in the lower platform, Lidun, the king of martial arts, is buried on the left platform, and on the right platform, Kegong Beiletacha Piangu is buried; in the middle are the three sections of Yucha, with a total of 21 levels. In front of Xingzu's tomb, there was an ancient elm tree with a fork three feet above the ground. Legend has it that this elm tree was the Hanging Dragon's Cave three feet above the ground.