Huai'an Mansion is located in Huai'an City, Jiangsu Province. It is the official residence of the ancient Huai'an Mansion. In the early Ming Dynasty, Yao Qian, the Huai'an Zhifu, was rebuilt on the basis of the Wutong Temple of the Southern Song Dynasty and the Yuan Dynasty Yuan Wanhu Mansion. It was used as the new government office of Huai'an Mansion until the end of Qing Dynasty. The entire government department is large in scale, of which the lobby is said to be the largest in the country, with an area of more than 500 square meters. There are more than 600 houses in the building, divided into East, Central and West 3rd Road, Middle Road has lobby, Six-科 room, Second Hall, etc. East Road is the place for welcoming guests and banquets, and West Road is the military arrest hall.