Sichuan Changzheng Engineering Design Co., Ltd. was established on September 27th, 2003. Its registered address is located in Baiyang Middle Road, Shizhong District, Leshan City, and its CEO is Xiong Jian. Its business scope is Grade B engineering design and engineering technical consultation in chemical, petrochemical and pharmaceutical industries. Architectural engineering design, general contracting of architectural engineering, project management and related technical and management services. Sichuan Heli Cleaning Group Co., Ltd. was established on 20 14-07- 16 with its registered address at Jiangxi Road, Cheng 'a Industrial Development Zone, Jintang County, Chengdu, and its CEO is Yong Cheng. Its business scope covers technology research and development, technology transfer, technical consultation and technical services in the field of clean technology, as well as the production, sales and installation of clean equipment. Refrigeration, air conditioning equipment manufacturing, electronic industry special equipment manufacturing, metal products processing and sales, environmental protection engineering construction. Medical device sales.