Tian Lun Gas Holdings Co., Ltd. (formerly known as China Tian Lun Gas Holdings Co., Ltd.) is a Chinese investment holding company mainly engaged in gas sales and engineering installation services. The company operates four divisions. The natural gas retail division mainly sells natural gas to residential users, commercial users, and transportation users. The natural gas wholesale division mainly sells natural gas to urban gas companies and wholesale customers. The engineering installation and service division mainly engages in gas pipeline connection and engineering construction. The business of all other divisions includes leasing real estate and other value-added services.