Huai'an Mansion, is an existing ancient government-level official residence building, located in Huai'an City, Jiangsu Province, a famous national historical and cultural city, as a national AAAA-level tourist attraction, located in Huai'an Old City Huai'an District Dongmen Street, north of the Governor-General's Transportation Department. The lobby of Huai'an Mansion is the largest in the country, with an area of more than 500 square meters. Huai'an Mansion is a symbol and witness of Huai'an's historical status, and its scale is huge.