China Huadian Engineering (Group) Co.
Urban Construction Research Institute
Beijing Wanbangda Environmental Protection Technology Co.
China Beijing Metallurgical Engineering & Technology Co.
Tongfang Company Limited
China Light Industry Co.
Beijing Sander Environmental Engineering Co. Ltd.
Beijing Municipal Professional Design Institute Co.
Wuzhou Fuji Chemical Water Engineering Co.
Beijing Meihua Boda Environmental Engineering Co.
China Datang Group Science and Technology Engineering Co.
Beijing Bocci Electric Power Technology Co.
Beijing Zhonglianhuan Engineering Co. Ltd.
Beijing Zhongbei Environmental Technology Development Co.
Beijing Huanlike Environmental Engineering Technology Co.
Beijing Guohuan Qinghua Environmental Engineering Design & Research Institute Co.
China Nuclear Power Engineering Co.
Beijing Construction Jinyuan Environmental Protection Development Co.
Beijing Langxin Ming Environmental Protection Technology Co. Ltd.
Beijing Huanke Environmental Engineering Design Institute
Beijing Yongxin Environmental Protection Co.
Beijing Zhongke Guoyi Environmental Protection Engineering Co.
Beijing Kiyat Environmental Protection Engineering Co.
Beijing Municipal Engineering Science and Technology Design Institute
Xuji Lianhua International Environmental Engineering Co. Ltd.
Beijing Shihua Oil & Sea Engineering Technology Co.