Huai'an Mansion is located in Huai'an City, Jiangsu Province, is one of the few existing ancient government-level residence buildings. Huai'an City is divided into old and new cities, while Huai'an Mansion is located on Dongmen Street, Huai'an District, Huai'an Old City, in the north of the Governor's Transportation Department. The lobby area of Huai'an Mansion is more than 500 square meters, the largest in the country, behind the lobby is the inner hall and the back garden. The entire building covers a wide area and is large in scale, which proves Huai'an's position and influence in history from the side.