Introduction to Zhengnan Gate: The third entrance is called "Zhengnan Gate". It is composed of three arches, which resemble the word "Chuan", so it is also called "Chuanmen". The meaning of Chuanmen is to come to worship Nanyue. There is an endless stream of believers in the Holy Emperor. The Zhengnan Gate is the middle of the three Sichuan Gates. In ancient times, only emperors, emperors and court officials could pass through it. Common people could only go through the East and West Sichuan Gates. The original attic above the doorway was blown up by the Japanese army in 1938, and the current attic was rebuilt in 1997. The three characters "Zhengnanmen" were inscribed by Liu Zheng, the former governor of Hunan Province.