Xi'an City Xi'an City Wall.

Xi'an City Wall is one of the largest and best-preserved ancient city walls in China, and is a first-class national cultural relic protection unit. The general term "Xi'an City Wall" includes the Tang Dynasty City Wall and the Ming Dynasty City Wall, but it usually refers specifically to the Ming Dynasty City Wall. The Ming Dynasty City Wall is located in the center of Xi'an City, Shaanxi Province. The wall is 12 meters high, 12-14 meters wide at the top, and 15-18 meters wide at the bottom. The outline is a closed rectangle with a circumference of 13.74 kilometers. The area within the city wall is commonly referred to as the ancient city area, covering an area of 11.32 square kilometers. The famous Xi'an Bell and Drum Tower is located in the center of the ancient city area. There are four main city gates of Xi'an City Wall: Changle Gate (East Gate), Yongning Gate (South Gate), Anding Gate (West Gate), and Anyuan Gate (North Gate). These four city gates are also the original city gates of the ancient city wall. Since the Republic of China, in order to facilitate access to the ancient city area, many city gates have been opened one after another. There are now 18 city gates in Xi'an City Wall. There are 18 city gates in Xi'an City Wall, starting from Yongning Gate and going clockwise: Yongning Gate, Zhuque Gate, Wumu Gate, Hanguang Gate, Anding Gate, Yuxiang Gate, Shangwu Gate, Anyuan Gate, Shangde Gate, Liberation Gate, Shangjian Gate, Shangqin Gate, Chaoyang Gate, Zhongshan Gate, Changle Gate, Jianguo Gate, Peace Gate, Wenchang Gate. These 18 city gates were formed at different times and have different specifications.