All kinds of engineering construction activities (approved projects in accordance with the law, after the approval of the relevant departments before starting business activities) general projects: Architectural decoration, plumbing pipe parts and other construction metal products manufacturing; Environmental Protection Special Equipment Manufacturing; Special equipment manufacturing (excluding licensed special equipment manufacturing); Motor manufacturing; Fire fighting construction; Fire fighting equipment sales; Refrigeration, air conditioning equipment manufacturing; Refrigeration, sales of air conditioning equipment; General equipment repair; Fan, fan manufacturing; Pump and vacuum equipment manufacturing; Technical services, technical development, technical consultation, Technical Exchange, technology transfer, technology promotion (in addition to licensing business, may independently operate non-prohibited or restricted projects in accordance with laws and regulations