海南封关原来是国家下的百年大棋，实际是为14亿人饭碗筑防火墙？

Group 1 - The core point of the article is that the official launch of the Hainan Free Trade Port's full island closure is a strategic move by the country to enhance food security and industrial safety for its 1.4 billion population [3][19] - The closure does not restrict access for mainland residents to Hainan, maintaining existing travel and documentation requirements, while significantly changing the flow of goods [3][5] - The "zero tariff" product list has expanded from 1,900 to approximately 6,600 items, covering nearly 74% of product categories, which is a 53 percentage point increase compared to before the closure [5][10] Group 2 - The processing and value-added tax exemption policy encourages enterprises to use imported materials for processing in Hainan, allowing for tax exemptions on goods sold to the mainland after a value addition of over 30% [5][10] - As of November 2025, there are 129 enterprises participating in the processing value-added tax exemption pilot, with cumulative domestic sales exceeding 10 billion yuan [7] - The policy acts as a "price firewall," enabling companies to process raw materials at lower costs in Hainan, thus stabilizing prices in the mainland market during international price fluctuations [10][19] Group 3 - Hainan's unique climate conditions allow for faster breeding of crop varieties, with over 70% of new crop varieties in China developed in the "South Breeding Valley" [12][14] - The closure facilitates easier access to high-quality foreign seed resources, enhancing China's agricultural technology and genetic resource acquisition [12][19] - The aviation maintenance industry in Hainan benefits from zero tariffs on imported materials and a capped income tax rate of 15%, leading to a significant cost advantage [15][17] Group 4 - The international business share of aircraft maintenance in Hainan has increased from 0.9% to 24.6% from 2022 to 2024, while international aircraft painting business share rose from 13% to 50% [17] - The strategic initiatives in Hainan are not only focused on tourism but also on ensuring national food security and industrial competitiveness [19]