The registered address of shanghai changhui sanitary technology ltd. Is located on the 2nd floor of the north pine road, no. 5255, in the town of song river, shanghai city. The registration authority is the market supervision authority of the songjiang region, represented by a legal person, liu yuxia, and operates in the fields of purification, technological development, technical advice, technology transfer and technical services, water purification equipment and accessories, environmental protection equipment, dust removal equipment, air conditioning ventilation and maintenance services. [projects subject to legal approval may not operate without the approval of the relevant department]