（央视财经《经济信息联播》）自2025年12月18日起，海南自由贸易港正式启动全岛封关。包括自贸港 货物进出"一线""二线"及在岛内流通税收政策，进口征税商品目录等系列文件，将于正式启动全岛封关 之日起施行。全岛封关运作是海南自贸港建设的标志性工程，封关不是封岛，而是进一步扩大开放。海 南自贸港封关的核心是："一线"放开，"二线"管住，岛内自由。 "一线"，指的是海南自贸港和我国关境外的其他国家和地区之间；"二线"，指的是海南自贸港和内地之 间；"一线"放开，放什么呢？包括6600多种货物可以免关税进入海南岛等。"二线"管住，到底管的是什 么？"一线"放什么，"二线"就管什么。海关要在"二线"管住"一线"放开的"零关税"货物、放宽贸易管理 措施的货物。有些零关税到海南的货物，从海南进入内地，可以补缴进口税收。有些在海南本地加工增 值达到30%的，那就可以免关税进入内地。 那以后普通人去海南是不是变麻烦了？其实"二线"管住只针对"货"，不针对"人"！您去海南旅游、出 差，拿身份证买张机票、船票，说走就走。 封关后，"零关税"货物，在海南岛内可以自由存放，不用受存储期限限制；享惠企业之间可以自由互相 买卖、加工这 ...

Core Viewpoint - The establishment of the "second line port" in Hainan Free Trade Port aims to facilitate efficient and secure transportation of goods, personnel, and vehicles between Hainan and the mainland, supported by a series of policy documents and management measures [1][6]. Summary by Relevant Sections Customs Management - Three categories of goods, including "zero tariff" goods, processing and value-added goods exempt from tariffs, and goods benefiting from relaxed trade management measures, must pass through the customs supervision channel at the "second line port" [2]. - Non-customs supervised goods, personnel, items, and vehicles will be managed according to existing regulations without additional inspection or documentation requirements [2]. Passage Management - To enhance the efficiency of the "second line port," several innovative facilitation measures will be implemented: - A "one-stop customs clearance" model will be established, allowing enterprises to declare goods online in advance, with customs and security departments coordinating operations for streamlined clearance [3]. - The management of certain procedures, such as agricultural product inspections and additional fee collections, will be relocated outside the port area to prevent congestion [4]. - Smart supervision will be strengthened through the use of big data and artificial intelligence, promoting information sharing and mutual recognition among customs, maritime, border inspection, and port operation units [5]. - A credit management system will be developed to classify and regulate services based on credit ratings, reducing inspection frequency for high-rated enterprises to facilitate faster clearance [6]. Overall Outlook - The Hainan Free Trade Port is expected to maintain convenient exchanges with the mainland post-closure, providing enhanced intelligent and convenient passage experiences for various entities, especially tourists [6].