China's four most famous buildings

The four most famous buildings in China are the Great Wall, the Forbidden City, the Potala Palace, and the Mogao Grottoes.1. The Great Wall of China: built during the Western Zhou Dynasty, it spreads across Hebei, Shanxi, Shanxi, and Jilin and Liaoning, and is one of the seventh wonders of the world. The Great Wall of China has a unique defense system, such as walls, floor drains, pier forts, beacon towers, etc. It is the crystallization of the wisdom of ancient Chinese people.