Import and export of goods and technology, Border small trade, Tourism shopping trade export business, House rental; Sale: Mechanical and electrical products、 steel、 building materials、 Hardware and Electrical、 Decorative materials、 Metal materials、 Chemical products、 Petroleum products、 Instruments、 sporting goods、 fitness equipment、 Clothing, shoes and hats、 Electronics、 rubber products、 Agricultural and livestock products、 fertilizer、 organic fertilizer、 compound fertilizer、Ground film; Wholesale and retail: Pre-packaged food and bulk food, aquatic products, fresh fruits and vegetables, Air ticket sales, Business Information Consulting, Daily necessities, Communication products( Except for second-hand mobile phones) Home appliances, furniture, Office automation equipment, flowers, fur products,