Domestic air passenger and cargo transportation business, air passenger and cargo transportation business from the mainland to Hong Kong, Macau Special Administrative Region and neighboring countries; airline agency business; service business related to air transport business; intercity chartered passenger transport; city-county fixed line tourist passenger transportation; engaged in the import and export business of goods and technology; agent cargo transportation insurance, health insurance, life insurance, accident insurance, liability insurance; prepackaged food (excluding cooked food, frozen and refrigerated flavors), handicraft gifts, household appliances, communication equipment, household appliances, communication equipment, daily necessities, hardware and electricity, textiles, electronic products, chemical materials (excluding raw materials)) Wholesale and retail of metal materials, instruments, machinery equipment, and auto parts; own equipment leasing business; employee cafeterias, airline catering (limited to branch operations). (If the operation of an enterprise involves an administrative license, it is operated on the basis of a license)