Category 1: chemical raw materials, hydrogen, heavy hydrogen, oxidant, acid, alkali, salt, metal
Category 2: pigments, paints, coatings, varnishes, anticorrosive paints
Category 3: detergents, cleaning agents, care products, perfumes, nail polishes and cosmetics
. Metal alloy, metal building materials and pipes
Category 7: mechanical equipment, mechanical parts and industrial equipment
Category 8: hand tools, knives and scissors, scissors, craft utensils, utensils and tableware
Category 9: computer hardware, programs, software and electronic equipment
Category 1: medical instruments, surgical instruments and tableware. Body
category 13: firearms, ammunition, explosives
category 14: jewelry, clocks, decorations, jewelry, precious stones, diamonds
category 15: musical instruments, audio equipment, music recording materials
category 16: paper, printed matter, publications, stationery, office supplies
category 17: Decorative materials
category 19: nonmetallic building materials, cement, gypsum, ceramics, marble and stone
category 2: furniture, household goods, mattresses, pillows, blankets and carpets
category 21: kitchen utensils, household utensils, tableware and glassware
category 22: cables, ropes, tents and glassware. Fabric
category 25: clothing, shoes, hats, necklaces, gloves, belts
category 26: flowers, seedlings, sesame seeds, beets, grains
category 27: carpets, turf, lawns, outdoor plants, forest products
category 28: toys, games, sporting goods, entertainment goods. Biscuits
category 31: fresh fruits, fresh vegetables, natural plants and flowers
category 32: beer, wine, drinks and fruit juice
category 33: wine, spirits, bitter wine, beverage ingredients and tobacco products
category 34: tobacco products, cigarettes, cigars and pipes
category 35. Loan
category 37: construction, repair, installation services, injection molding services, pipeline maintenance services, cleaning services and waste recycling services
category 38: communication, telegraph, telephone, radio, television, e-mail, Internet, information consultation, data storage and data processing
category 39: land transportation, water transportation, air transportation. Cloud computing service, e-commerce and online trading platform
Category 41: education, training, entertainment, sports and cultural activities
Category 42: science and technology, research and development, technical consultation, database, software design, industrial analysis, chemical analysis and physical experiment
Category 43: tourism, restaurants, cafes and hotels <