There were city gates in ancient palaces, such as Xuanwu Gate, etc. Forgive my ignorance, thank you.
The doors of the imperial palace vary from dynasty to dynasty. But most of them are named according to the theory of Feng Shui, Qinglong on the left, White tiger on the right, Suzaku on the south, and Xuanwu on the north.
For example, the gate names of the Taiji Palace in Chang'an, the capital of the Tang Dynasty, clockwise from the southeast are: Jiafu, Changle, Chengtian, Guangyun, Fanglin, Xuanwu, and Xuanfu. The names of the gates on the outer city wall are: Qixia, Mingde, Anhua, Yanping, Jinguang, Kaiyuan, Guanghua, Jingyao, Fanglin, Xuanwu, Xuanfu, Tonghua, Chunming, Yanxing.
Nine gates in the inner city of Beijing in the Qing Dynasty: Zhengyang Gate, Chongwen Gate, Xuanwu Gate, Chaoyang Gate, Fucheng Gate, Dongzhimen, Xizhimen, Anding Gate, Desheng Gate
Outside Seven gates of the city: Yongding Gate, Zuo'anmen, You'anmen, Guangqumen, Guang'anmen, Dongbianmen, Xibianmen Four gates of the imperial city: Tiananmen, Di'anmen, Dong'anmen, Xi'anmen
Other gates in the imperial city: Daming Gate, Duan Gate, East Three Gates, West Three Gates, and four palace gates: Meridian Gate, Shenwu Gate, Donghua Gate, and Xihua Gate.
A considerable part of the inner city of Beijing in the Ming and Qing Dynasties overlapped with the capital city of the Yuan Dynasty. The east and west city walls and city gates also overlap with the Yuan Dynasty city gate walls. Although the names of the city gates are different, the original meaning of the city gate setting is the same. The meanings of each of its gates are: Xizhimen (Yuanheyimen), which is called the open door and belongs to the emperor’s Xiaoyu Gate. Fuchengmen (Yuan Qihuamen), called Dumen, is the gate for rest. Dongzhimen (Yuan Chongrenmen), Shangmen, the door of transactions. Deshengmen (Yuan Jiandemen) is a gate of repair and noble moral character. Anding Gate (Yuan'an Zhen Gate), Shengmen, the Gate of Abundance, the emperor went to the Temple of Earth to pray through this gate every year. Chongwen Gate (Yuan Hade Gate), the gate of light and prosperity. Xuanwumen (Yuanshunchengmen) is the gate of death and the gate of misfortune. People often use this gate for funerals. In the Qing Dynasty, people were killed at Caishikou and prisoners used this gate. Zhengyangmen (Yuanli Main Gate), the national gate, only allowed the emperor to pass through.