Road motor vehicle production; Railway rolling stock manufacturing. (For projects that need to be approved according to law, business activities can be carried out only after being approved by relevant departments. Specific business projects are subject to the approval documents or licenses of relevant departments. ) General items: Import and export of goods; Construction of machinery; Mining machinery manufacturing; Mechanical equipment research and development; Automobile sales; Used car brokers; Motor vehicle appraisal and evaluation; Rental of construction machinery and equipment; Sales of machinery and equipment; Machinery parts, spare parts sales; Manufacturing of mechanical and electrical equipment; Technical service, technology development, technology consultation, technology exchange, technology transfer and technology popularization; Sales of daily necessities; Sales of daily necessities; Wholesale of apparel; Used sales; Food sales (only prepackaged food sales); Sales of agricultural and sideline products; Wholesale of edible agricultural products; Furniture sales; Household appliance sales. (Except for projects subject to approval according to law, business activities shall be carried out independently according to law with the business license) (Independently publicized featured items: Technical service, technology development, technology consultation, technology exchange, technology transfer, technology popularization (the new technology, new process, new product that can be put into production or existing in practical application for solving the problem of research and test and development activities of energy-saving technology engineering)