• hefei gas group co., ltd. of anhui province • changsha xin’ao gas co., ltd. of hunan province • wuhan natural gas co., ltd. of hubei province • xiangfan daming natural gas co., ltd. of hubei province • dalian coal gas company of liaoning province • dandong coal gas rebuild engineering headquarter of liaoning province • xianyang coal gas company of shaanxi province • yan’an gas company of shanxi province • yantai natural gas engineering preparation department of shandong province • coal gas modification headquarter of dandong, liaoning province | • guozhen energy development co. ltd. of fuyang, anhui province • chengdu water supply company of sichuan province • guangzhou water supply company of guangdong province • hangzhou water supply company of zhejiang province • zhengzhou water supply company of henan province • lanzhou water supply company of gansu province • xi’an water supply company of shanxi province • harbin water supply company of heilongjiang province • dalian water supply company of liaoning province • jinan water supply company of shandong province • shijiazhuang water supply company of hebei province |