Which area does Beijing Cheng Nan refer to? Many movies and books like to mention Cheng Nan. What did Cheng Nan do before Beijing?

The old Beijing urban area can basically be understood as within today's second ring road, which contains administrative areas basically equivalent to four urban areas: Dongcheng, Xicheng, Chongwen and Xuanwu. It is generally believed that the Dongcheng and Xicheng of old Beijing belong to the North City, while Chongwen and Xuanwu belong to Cheng Nan.

There is also an understanding that the inner and outer cities of old Beijing are basically equivalent to the northern city of Wanaki. The reason why we say "inside" and "outside" is because in the Ming Dynasty, when Jingshi and Judy were founded, there were nine gates, namely Deshengmen, Xizhimen, Dongzhimen, Zhengyangmen, Xuanwu Gate and Chongwenmen. Later, in order to strengthen defense, outer cities were built, including Guangqumen, Guang 'anmen, Yongdingmen and so on. This is the saying of "nine inside and seven outside" in Beijing. Later, Manchu people in the Qing Dynasty entered the customs, followed Beijing, the capital of the Ming Dynasty, and moved the Han people from the original inner city to live in the outer city, which was further strengthened.

Later, * * * and the national capital Beijing demolished the old city wall, but for a long time after 49 years, it was still built in the original "old Beijing". After the wall was demolished, the concepts of "inner city" and "outer city" gradually faded, while the historical, cultural and social differences between the inner city and the outer city still existed, so the words "north city" and "south city" gradually appeared.

Today's Beijing, for a long time, has developed according to the pattern of "spreading big cakes" and developed into a "six-ring road". The original suburbs have become urban areas. In people's general life, the concepts of South City and North City have also been extended. Generally speaking, it is bounded by Qianmen East-West Avenue and Chang 'an Avenue extension line, south to Cheng Nan and north to Beicheng.