General Item: Sales of Special Equipment for Petroleum Drilling & Production; Sales of Mechanical Equipment; Sales of Special Equipment for Oil Refinery, Chemical Engineering Production; Metal Materials Sales; Sales of Metal Structure; Sales of Construction materials; Sales of Electric Generator & Generator Set; Sales of Special Equipment; Sales of Pump & Vacuum Equipment; Sales of Pipeline Transportation Equipment; Sales of Construction machinery for Building Projects; Sales of Electrical Equipment; Whole-sale for Hardware Exhibits; Sales of Intelligent Unmanned Aerial Vehicle; Sales of Instruments and Apparatus; Sales of Petroleum Products(Excluding Hazardous Chemicals Substance); Sales of Chemical Products (Excluding Permitted Chemical products); Sales of Specialized chemical products); Rental of Mechanical Equipment; Information Consulting Service(Excluding Permitted Information Consulting Service); Import & Export of Cargo; Technical Export & Import. (Except for items approved as per law, will self-operate business independently as per Business Licenses. )