Laozheng Steel Material

Jinghua Tube Industry (Municipal Pipeline Building Materials)

Rifeng Pipe Rifeng Floor Heating Thermostat (Kaifang Roundabout Shop)

Beijing Junqing Tube Industry (Times Building Materials Home Furnishings Guangchang Branch)

Hardware and Building Materials Water Heating Pipe Fittings

Weixing Pipeline (Beijing Qianwanjian Construction Decoration Engineering Co., Ltd. Shop)