The group and its subsidiaries are listed companies of the stock exchange , high-tech enterprises , and exhibitors of the CantonFair . Approved by CE certification , ISO9001 certification , ISO14001 environmental certification and OHSAS18001 occupational health certification . Registered
trademark " Changmao " brand . The products have been adopted by Beijing West Railway Station CCTV , Yanshan Petrochemical , Shanghai Baosteel Power Plant , Shanghai Mingzhu TV Tower , Dubai Star Hotel , UK University , etc., and exported to the United States , Japan , Spain , the United Kingdom , Germany , South Korea , Singapore , Malaysia , Dubai , SouthAfrica . Brazil and other countries.