China Coast Guard Rotates Patrols East of Taiwan, Cementing Maritime Presence

The China Coast Guard (CCG) announced Wednesday that its Putuoshan ship formation has conducted routine law enforcement patrols in waters east of Taiwan, marking the third confirmed rotation of CCG vessels in a continuous patrol regime that began in June. CCG spokesperson Jiang Lue stated that the formation has been strengthening control of relevant sea areas since August, according to Xinhua News.

The patrols, which Beijing describes as routine law enforcement activities in waters it claims as its jurisdiction, represent a significant shift in the maritime balance around Taiwan. The CCG said the operations are intended to safeguard the legitimate rights and interests of Chinese people, including Taiwan compatriots, and that it will continue to strengthen law enforcement patrols in China’s jurisdictional waters.

Origins of the Patrol Regime

The continuous patrols began on June 1, 2026, in direct response to the May 28 announcement by Japanese Prime Minister Sanae Takaichi and Philippine President Ferdinand Marcos Jr. that their countries would begin negotiations to delimit their exclusive economic zone (EEZ) boundaries in areas east of Taiwan. Beijing condemned the talks as “unilateral” and “seriously infringing upon China’s maritime rights,” as China Daily reported.

China’s Taiwan Affairs Office spokeswoman Zhu Fenglian asserted that “there is only one China in the world, and Taiwan is part of China,” calling the Japan-Philippines move “entirely illegal and without validity.” The first CCG patrol, led by the Daishan ship formation, was dispatched within hours of Beijing’s condemnation, as BusinessWorld reported at the time.

A Pattern of Rotations

The September 3 patrol by the Putuoshan formation follows a clear rotation pattern. The Daishan group patrolled from June 1 to July 4, when it was replaced by the Xiushan formation. The Xiushan group continued operations until approximately August 4, when a fresh pair of CCG ships arrived. The Putuoshan formation now represents the third confirmed rotation, confirming that the patrols have become a permanent feature of the maritime landscape rather than a temporary operation.

According to analysis from the Institute for the Study of War, the monthly rotation pattern matches the model used by the CCG in other disputed areas such as the Senkaku/Diaoyu Islands, where China has maintained near-daily patrols since 2012. The patrols are conducted approximately 74-124 nautical miles (137-230 kilometers) from Taiwan’s shores, within Taiwan’s claimed EEZ.

Strategic Significance

The waters east of Taiwan hold critical strategic importance as the corridor through which US and Japanese reinforcements would arrive in any Taiwan contingency. Taiwan’s eastern coast has long served as its strategic sanctuary, with hardened mountain bases at Hualien and Taitung protecting its F-16 fighter fleet. The CCG patrols represent the first time Beijing has permanently extended its territorial enforcement beyond the first island chain.

Analysts have described the patrols as part of a broader “quasi-quarantine” campaign that includes research vessel surveys, law enforcement operations against commercial shipping, and military exercises. As AFP reported via the Inquirer, Ray Powell, director of the maritime monitoring organization SeaLight, said: “China is essentially announcing a new normal. It’s a very unsubtle signal that they intend to stay there for the long term.”

Su Tzu-yun, a military expert at the Taipei-based Institute for National Defense and Security Research, warned that “by conducting radio verification procedures for passing commercial vessels, China is effectively rehearsing the mechanisms required for a future blockade or quarantine.” Gregory Poling, director of the Asia Maritime Transparency Initiative at CSIS, told AFP that “Beijing appears to be claiming vast law enforcement rights across its claimed exclusive economic zone that go far beyond what is allowed by international law.”

Escalating Maritime Pressure

The patrols east of Taiwan are part of a broader pattern of increased Chinese maritime activity around the island. Taiwan’s Coast Guard Administration reported a record 244 Chinese government vessels around Taiwan’s main island in July 2026, compared with 55 in June and 30 in May, as documented by the Formosan Association for Public Affairs. Since May, 1,247 Chinese vessels have been recorded around Taiwan, with approximately 60 percent being CCG vessels.

The CCG has also conducted operations beyond simple patrols. Between June 6 and 10, China’s Ministry of Transportation deployed four civilian law enforcement ships on a special operation east of Taiwan, inspecting 198 vessels and hailing commercial ships to demand information about their crews and destinations. During the same period, Chinese research vessels conducted marine surveys in the area under CCG escort, according to SCMP.

Taiwan’s Response

Taiwan has firmly rejected China’s claims of jurisdiction in these waters. Taiwan’s Coast Guard Administration has stated that China has no sovereign rights in the waters east of Taiwan and that the patrols violate international law. Taiwan has deployed its own coast guard vessels to monitor and shadow the Chinese ships, as reported by the Defense Post.

Taiwan’s Ocean Affairs Deputy Minister Sung Chen-en said the patrols must be stopped “at the early stage,” adding: “We will make sure that the patrols are not permanent because they are not supposed to be here.” Taiwan has also advised vessels operating off its east coast not to comply with any boarding or inspection demands from China’s coast guard.

International Reaction and Outlook

The United States, Britain, France, and Germany have expressed concern over the “novel” activity, with the US State Department calling Chinese drills a source of “unnecessary” tension. However, international response has been relatively muted, with limited concrete action taken to counter the patrols.

The CCG’s normalized presence east of Taiwan is likely to continue and potentially expand. As Reuters reported via Khaama, the patrols are part of Beijing’s broader effort to assert jurisdiction over waters around Taiwan and pre-position assets for potential future military operations.

Analysts at the Institute for the Study of War assess that the PRC will likely continue coast guard patrols, law enforcement missions, military drills, and scientific surveys in the area to assert its jurisdiction, prevent rival states from making use of those waters, and pre-position assets for future military operations. The key question now is whether Taiwan and its international partners will take more concrete steps to counter what has become a permanent Chinese maritime presence in the waters east of the island.