The Forbidden City stands in Beijing, the capital of China. The Forbidden City is one of the largest existing ancient wooden buildings in the world. As a Chinese ancestral building, it will celebrate its 600th birthday next year. When the reporter was searching for the story of the construction of the Forbidden City in the Yongle reign of the Ming Dynasty, Zhao Zhongnan, an expert of the Palace Museum, said that the actual construction time of the Palace Museum was only three and a half years, but the preparation process cost a lot, and it took a total of 100000 people for more than ten years.