Introduction to Danfeng Gate: The status of Danfeng Gate is the same as that of Chengtian Gate in Taiji Palace. They are both the main gates of the palace. The doorways are the same 8.5 meters wide. However, Chengtian Gate has three doorways with slightly lower levels. At that time, although the Mingde Gate, the south gate of Chang'an City, also had five doors, its width was only 5 meters, and its system and scale were far less noble and substantial than that of the Danfeng Gate. It can be seen that the Danfeng Gate has a high status, high rank and large scale, ranking first among the Chengmen Gates in the capital.