此举起因于日本与菲律宾宣布启动划定重叠海域边界的谈判，北京以此为由扩大海上存在，并派遣包含万吨级海巡舰在内的多艘舰艇绕行台湾，甚至首度在该航道询问外国商船并进行所谓的查验，显示中国正逐步将对台施压重心由台湾海峡延伸至连通美军盟友的东部战略补给生命线。（关键数字：10,000, 09）
军事与战略专家指出，北京借由海警而非海军展开常态化执法巡航，旨在避免直接引发军事冲突，同时为未来对台实施全面海上封锁预作演练并测试国际反应；此举被美方谴责为高度破坏区域稳定，并大幅增加美国及其印太盟邦采取应对措施的压力。
Since June 2026, the China Coast Guard has expanded routine patrols to waters east of Taiwan for the first time, deploying an average of two large cutters per month across a vast area of 27,100 square nautical miles—typically maintaining a distance of 30 nautical miles from Taiwan's eastern coast in an apparent bid to establish a new maritime normal.
Triggered by boundary delimitation talks between Japan and the Philippines, Beijing leveraged the situation to surge law enforcement ships, including the 10,000-ton Haixun 09, to encircle Taiwan while questioning and inspecting passing foreign commercial vessels, shifting strategic pressure from the Taiwan Strait toward Taiwan's vital eastern maritime lifeline connecting US allies.
Strategic and defense analysts observe that utilizing coast guard cutters rather than naval warships allows Beijing to build a continuous presence and rehearse blockade operations while minimizing immediate military confrontation; however, the United States has condemned these actions as deeply destabilizing, placing mounting pressure on Washington and its regional partners to respond.