Operations prohibited by laws, regulations, and State Council decisions shall not be conducted; operations requiring approval (licensing) under laws, regulations, and State Council decisions shall be conducted only after obtaining approval from the审批 authority and holding the relevant approval (license) documents; operations not requiring approval (licensing) under laws, regulations, and State Council decisions shall be independently chosen by market entities. (Railway transportation equipment development, manufacturing, sales, and repair; production and sales of springs and forged/cast products; large metal structure manufacturing and sales; export business of self-produced products and technologies; import and export business of raw materials, instruments, meters, mechanical equipment, parts, and technologies required by the enterprise; automobile complete vehicles and parts sales. (Excluding goods and technologies restricted by the state from being operated or imported/exported by the company))