Introduction to Dajinmen: Dajinmen is located more than 750 meters northwest of Xiamafang. It is the first due south gate of Xiaoling Mausoleum. The door was originally a building with yellow glazed tiles and double eaves. The existing masonry wall has a stone Xumizuo at the bottom, with a width of 26.66 meters and a depth of 8.09 meters. There are three door openings in the wall. The middle door is 5.05 meters tall, and the left and right doors are 5.05 meters high. The door height is 4.25 meters.