Gan Xi’s residence house began construction in Jiaqing era. Commonly known as “ninety-nine and a half rooms”, together with the Xiaoling Tomb of Ming, Nanjing Ming Dynasty City Wall are the “Three Landscapes of Ming and Qing Dynasties in Nanjing. With a high historical, scientific and tourism value, Gan Xi Residence is the largest and best preserved private house in Nanjing area.