Introduction to the Liu Family Courtyard: The Liu Family Courtyard was originally the residence of Liu Dengji, a wealthy man who was a landowner, businessman, and industrialist in the old days. It was built during the Daoguang period of the Qing Dynasty, with an area of ​​1,800 square meters and a 12-meter-high fire wall. It is the most complete existing landlord's residence in Chongqing.