Environmental protection technology development、 Technology R&D、 Technology Transfer、 Technical Services, Environmental impact assessment consulting, Sales of environmental equipment, Technology development of environmental equipment、 design, Sales of environmentally friendly materials, Sales and installation of housing equipment, Water treatment projects、 Environmental Protection Engineering、 Design and construction of landscaping projects。 Electronics、digital products、 Technical development of computer software, hardware and security equipment、 On-site installation and repair; cell phone、 R&D and sales of computers and accessories, Plastic products、 Toy、 clothing、 Building Materials、 Metal mineral products( Except for mineral products purchased uniformly by state-designated units)、 Home appliances、 Hardware daily miscellaneous、 Non-ferrous metals( Contains precious metals)、 Chemical products、 fuel oil(Does not contain flammable, explosive or hazardous chemicals) Sales。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments)