Mainly includes paper, cardboard and some paper and cardboard products, office supplies. This category especially includes:-paper cutter and paper cutter; -Envelopes, covers or devices used to preserve or protect paper, such as folders, wallets, checkbook clips, paper clips, passport envelopes and scrapbooks; -Some office machines, such as typewriters, stenographs, office franking machines and pencil sharpeners; —— Paintings and painting tools for artists and indoor and outdoor painters, such as watercolor color plates used by artists, easels and color plates used by painters, rollers and color plates used for house painting, etc.; -Some disposable paper products, such as paper bibs, paper handkerchiefs and paper tablecloths; -Some paper products and cardboard products that are not classified according to their functions and uses, such as bags, envelopes and containers made of packaging paper, statues, statues and artworks made of paper or cardboard, such as paper figurines, framed or frameless lithographs, oil paintings and watercolors. In particular, this category does not include:-pigments (category II); -Artists use hand tools, such as spatula and carving chisel (category 8); —— Teaching instruments, such as audio-visual teaching instruments, mannequins for first aid training (Category IX) and toy models (Category XXVIII); -Some paper products and paperboard products classified according to their functions and uses, such as photographic paper (category I), sandpaper (category III), paper venetian blinds (category XX), paper cups and trays for desks (category XXI), paper and pillowcases (category XXI), paper clothes (category XXI) and cigarette paper (category XXXIV).