"一线"放开，就是将海南自由贸易港与我国关境外其他国家和地区之间作为"一线"，实施一系列自由便 利进出举措；"二线"管住，就是将海南自由贸易港与内地之间作为"二线"，针对"一线"放开的内容实施 精准管理；岛内自由，就是在海南自贸港内，各类要素可以相对自由流通。 对海南自贸港企业而言，封关运作后多项政策将持续释放红利。"零关税"商品数量将显著增加，覆盖约 74%的商品税目，惠及医药、高端食品加工等重点产业。享惠主体范围也全面扩大，基本覆盖全岛有实 际进口需求的各类企事业单位。截至目前，海南自贸港鼓励类产业条目已扩至1100多个，涵盖生物医 药、海上风电、专用汽车制造、绿色建材生产等，相关企业可享受15%的企业所得税优惠。 海南自贸港封关将给海南乃至全国带来哪些新变化？对国内国际投资者以及区域经贸合作，又有哪些影 响？近日，21世纪经济报道在第六届"海洋合作与治理论坛"期间对华阳海洋研究中心理事长、中国南海 研究院学术委员会主席吴士存进行了专访。 （原标题：21专访｜吴士存：应吸引更多世界500强企业入驻海南） 21世纪经济报道记者洪晓文 海南三亚报道 2025年12月18日，海南自贸港全岛封关正式启动。封关运 ...

Core Viewpoint - Hainan Free Trade Port officially launched its full island closure on December 18, which is expected to significantly impact the movement of people, the living and employment conditions of residents, and investment opportunities for businesses. Group 1: Customs and Trade Facilitation - The customs system is divided into "one line" for international trade and "two lines" for domestic trade, with the latter primarily regulating taxes and certificates for goods moving from the "one line" [3] - New customs measures such as "batch exit and centralized declaration" will allow companies to handle customs procedures after goods have actually left the island, reducing burdens on businesses [5] - The "no-sense customs clearance" system is being implemented, allowing for real-time information sharing among customs, anti-smuggling, and port departments [9] Group 2: Tax and Duty Policies - The "zero tariff" list has expanded from over 1,900 items to more than 6,600 items, increasing the proportion of zero-tariff goods from 21% to 74% of all goods [13] - A "double 15%" tax incentive policy has been introduced, allowing qualifying enterprises and key personnel to enjoy a 15% income tax rate [18] Group 3: Consumer Benefits - Residents can purchase 15 categories of "immediate purchase and pick-up" goods, including cosmetics and clothing, without limits on the number of purchases within a year [16] Group 4: International Cooperation and Investment - The full island closure will provide residents with more opportunities for international exchange and cooperation, supported by a visa-free policy for citizens from 86 countries [22] - Since 2020, over 9,600 new foreign enterprises have been established in Hainan, with investments from more than 170 countries and regions, enhancing Hainan's role as a headquarters base for foreign companies entering the Chinese market [25]