General projects: mechanical parts, parts processing; Sales of mechanical parts and spare parts; Special equipment manufacturing (excluding licensed professional equipment manufacturing); Hardware product manufacturing; Hardware products wholesale; Plastic products manufacturing; Sales of plastic products; Optoelectronic device manufacturing; Electronic components wholesale; Electronic components manufacturing; Mold manufacturing; Mold sales; Manufacture of rubber products; Rubber products sales; General equipment manufacturing (excluding special equipment manufacturing); Metal surface treatment and heat treatment; Spray processing (except for projects subject to approval according to law, independently carry out business activities according to the business license) License projects: road cargo transport (excluding dangerous goods) (projects subject to approval according to law, business activities can be carried out only after approval by relevant departments, specific business projects are subject to approval documents or license certificates of relevant departments)