Introduction to Baocheng: Baocheng, also known as Baoding, is a crescent-shaped building at the north end of the square city. Below it is the underground palace, where the coffins and funerary objects of the tomb owner and his wife are placed. Climbing to the summit, looking around, surrounded by green trees, the scenery is quiet and tranquil, as if you are in a city forest, where tranquility and tranquility arise spontaneously.