The earliest foundation of Beijing City was Youzhou City in the Tang Dynasty  In the next thousand years, Beijing has undergone four large-scale developments, expansions, or new constructions  They were the Yuan capital in the Jin Dynasty and the Yuan Dynasty in the Yuan Dynasty  In most cities, the inner city built in the early Ming Dynasty and the outer city built after the middle period, Beijing's convex-shaped city wall was completed in this way
The Qing Dynasty inherited Beijing from the Ming Dynasty, and the overall layout system of the city was not changed until the modern era
Beijing City expanded its outer city in the early Ming Dynasty.