Prince Gong's Mansion, the state key cultural relics protection unit, is the largest Wangfu in the Qing Dynasty, and has been used as the residence of Heyi and Yongxu. In 1851, Prince Gong became the owner of the house, and the name of Prince Gong's Mansion was also derived. The Prince Gong's Mansion has experienced the historical process of the Qing Dynasty from its heyday to its decline, carrying an extremely rich historical and cultural information, so there is a "one Prince Gong's Mansion, half of the history of the Qing Dynasty".