What are the characteristics of residential houses in Beijing's small plain?

Beijing was first recorded as Ji and was once the capital of the Five Dynasties in history. Beijing is located in the northwest edge of North China Plain, with an area of about10.6 million square kilometers.

Du Jun Shannankou Xishan and Guangou intersect to form a semicircle mountain bend extending to the southeast, which is called Beijing bend, and the small plain around it is Beijing plain.

The traditional houses in old Beijing are mainly quadrangles. The former residences and palaces of celebrities scattered in urban areas are generally more authentic quadrangles, such as Gongwangfu in Qianhai West Street.

Hutong is another feature of residential buildings in Beijing, which originated in Yuan Dynasty. There are more than 7000 hutongs in Beijing. The oldest hutong is Sanmiao Street, the longest hutong is Dongjiaomin Lane, and the narrowest hutong is Qianshi Hutong in Qianmen Dashilan.