The Imperial Palace in Beijing is one of the most important buildings in China. The Imperial Palace is characterized by Three Great Halls as the center, covering an area of about 720,000 square meters, with a building area of about 150,000 square meters, there are more than seventy palaces of various sizes. It is one of the world's largest and best-preserved groups of ancient wooden structures, and in 1987 it was listed as a World Cultural Heritage