building materials, Aluminum alloy products, R&D and sales of engineering equipment and construction machinery,Provide equipment installation and maintenance, diesel generator sets、 Gas generator sets、 Gasoline generator sets、 Diesel generator lighting equipment、 Mobile power station、 Sales, installation and commissioning services; Generator set maintenance、 lease; Food safety testing services; Environmental testing; Water quality testing services; General Instruments、 electronic equipment、 Drug inspection and testing equipment、 Food safety testing equipment、 Food safety testing reagents、 Environmental Meter、 Chemical reagents and additives( Monitoring chemicals、 Except for hazardous chemicals)、 Computer application electronic equipment、 Sales of complete sets of laboratory equipment and ventilation systems, Self-operated and agency import and export business of various commodities and technologies, However, this does not apply to goods and technologies that the state restricts enterprises from operating or prohibits import and export.。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments) General Projects: Sales of power electronic components; Mechanical and electrical equipment sales; Electrical equipment sales; bearings、 Gear and transmission parts sales; Construction machinery sales; Sales of metal chains and other metal products; Sales of metal wire ropes and their products; Sales of distribution switch control equipment; Metal tool sales; Mechanical parts、 Parts Sales; Sales of electronic components and electromechanical components; Sales of hydraulic power machinery and components; Electrical equipment sales; Sales of micro motors and components( Except for projects that require approval according to law, Carry out business activities independently in accordance with the law with a business license)