Lanjiang Yayuan has buried natural gas and a basement level for construction. According to relevant information, Lanjiang Yayuan has already planned the underground area when it was built. Only natural gas and the inner layer of the developed basement are buried underground. Lanjiang Yayuan is located in Daping, Yuzhong, Chongqing. It was built by Chongqing Jiujiu Real Estate Development Co., Ltd. with a total construction area of ??100,000 square meters, a total floor area of ??52,000 square meters, and a total of 698 houses. The community property company is Chongqing Yuxuan Property Management Co., Ltd.