海南自贸概念拉升，康芝药业20%涨停，中国中免等大涨

Group 1 - The core viewpoint is that the Hainan Free Trade Zone is set to officially launch its customs closure on December 18, 2025, which is expected to significantly enhance the region's tourism and retail market [1][2] - The announcement led to a strong market response, with companies like Kangzhi Pharmaceutical hitting a 20% limit up, and others such as Hainan Airport and Haixia Co. also reaching their limit up [1] - The customs closure will create a special customs supervision area across Hainan Island, implementing a policy characterized by "freeing up the first line, controlling the second line, and allowing freedom within the island" [1] Group 2 - The continued implementation of the offshore duty-free policy is expected to maintain the competitive advantage of duty-free operators, as it offers more relaxed limits for consumers entering the "second line" [2] - The closure is anticipated to enhance Hainan's attractiveness, increase the flow of people, and promote the overall development of the tourism retail market [2] - Companies that have established a leading advantage in core property layout, supply chain resources, and operational capabilities are likely to maintain their competitive position in Hainan's retail market under the new policies [2]