Introduction to Dangmen: The hub of Zhang Guying Village is Dangmen built during the Wanli period of the Ming Dynasty. The so-called Dangmen refers to the stone drums on both sides of the gate, which are also called Mendang. The bigger the family, the more prosperous and powerful the family is. The beam above the door is called "house", which represents a household. When the Tai Chi pattern engraved on the door echoes the door, the two together are called "door to door".