What inventions are not protected by utility model patents?

According to the current situation in China, Announcement No.27 of the State Patent Office lists the following objects that inventions and creations do not yet belong to: (1) the uses of various methods and products; (2) products without definite shapes, such as gas, liquid, powder and granular substances or materials; (three) products that are simply replaced by materials, and products with the same shape and structure produced by different processes; (4) immovable buildings; (5) Products with graphic design only, such as chess and cards; (6) Systems consisting of two or more instruments or equipment, such as telephone network system, water supply and drainage system, heating system, building ventilation and air conditioning system, data processing system, rolling mill, continuous casting machine, etc. (7) Simple circuits, such as pure circuits, circuit block diagrams, pneumatic circuit diagrams, hydraulic circuit diagrams, logic block diagrams, work flow diagrams, plane configuration diagrams, and basic electronic circuit products (such as amplifiers and triggers). ) essentially only has electrical functions; (eight) medical devices that directly act on the human body through electricity, magnetism, light, sound, radiation or their combinations.