Sales: food (the specific items shall be subject to the approval of the audit department and operated with valid license), agricultural and sideline local products (only for primary agricultural products); food additive processing and sales; production and sales of food machinery; purchase, packaging and sales of agricultural and sideline local products (only for primary agricultural products); road cargo transportation (the specific items shall be subject to the approval of the audit department and operated with valid license); Agricultural product technology research and development, technical consultation and technical services; warehousing services (excluding hazardous chemicals); self operation and agency of import and export business of general project commodities and technologies, and import and export business of licensed project commodities and technologies must be approved by the state before operation