1. Bonded processing Production enterprises in the comprehensive bonded zone can engage in bonded processing of imported raw materials from abroad and then export them (or sell them domestically), or purchase raw materials from domestically into the zone and then process and export them after tax refunds. The bonded processing function provides a policy niche for manufacturing enterprises that utilize both domestic and foreign resources and whose products are oriented to both the international and domestic markets. 2. The Bonded Logistics Comprehensive Bonded Zone can provide import and export enterprises inside and outside the zone with warehousing, distribution, value-added processing, international transfer, import re-export and other logistics services in a bonded state during the process of purchasing raw materials and selling products, with minimum utilization logistics costs to maximize corporate profits. 3. Goods trade: Trading companies are allowed to be registered in the comprehensive bonded zone. All types of enterprises in the zone have the right to operate import and export operations and can engage in global or regional procurement, distribution, and distribution business. For goods entering the zone, comprehensive processing of import and export consolidation or commercial value-added processing can be carried out, including grading and sorting, sorting, sorting, packaging, and marking. 4. Service trade: Engage in R&D and design, product testing, after-sales maintenance, equipment leasing and other service trade businesses related to bonded processing, bonded logistics, and goods trade in the comprehensive bonded zone. International shipping centers, procurement distribution centers, and operation settlement centers can be established. and futures delivery center. 5. Port function (virtual port): Utilize the international transportation hub resources of Qingdao Airport and Qingdao Qianwan Port, introduce truck flights, truck ships and other business models, extend the port function and move it to the Weifang Comprehensive Bonded Zone, which is equivalent to setting up in the Weifang Comprehensive Bonded Zone "Runwayless International Airport (Virtual Airport)" and "Waterless International Terminal (Virtual Terminal)" are established. For all import and export goods, the declaration, inspection, release and other procedures that were originally required to be handled at Qingdao Port can be completed in the Comprehensive Bonded Zone, without the need to go to Qingdao.