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.
The first large-scale development of Beijing City was in the Yuan Dynasty is correct.