Testing a “Quasi-Quarantine” Model: China Escalates Gray-Zone Pressure to Normalize Its Maritime Presence Around Taiwan
On June 19, 2026, Taiwan’s Coast Guard Administration (CGA) reported that a Chinese oceanographic research vessel had entered the nation’s restricted waters —which extend 12 to 24 nautical miles from the coast — off Yilan County on Taiwan’s east coast. The vessel intruded into the area for nearly five hours, ignoring the CGA’s demands to immediately leave the waters. A Chinese state media account attempted to justify the ship’s intrusion, falsely portraying it as a lawful environmental survey in so-called “China’s jurisdictional waters.”
The incident follows a recent pattern of Chinese maritime incursions into waters under Taiwan’s jurisdiction. Earlier in June, a Chinese coast guard vessel and a survey ship intruded into waters around Dongsha Island (Pratas Island) and waters east of Taiwan, while two Chinese official vessels entered restricted waters near Taiping Island (Itu Aba) for the first time.
Furthermore, the Chinese Coast Guard harassed international merchant ships in Taiwan’s eastern exclusive economic zone (EEZ), unlawfully demanding navigation data under the false pretext of Chinese jurisdiction.
These coercive activities were internationally condemned by the United States, the United Kingdom, France, and Germany in rare, coordinated statements. Taiwan’s CGA and Ocean Affairs Council (OAC) condemned the activities and adopted a “shadowing and monitoring” strategy to track Chinese vessels, deny them access to Taiwan-controlled waters, and avoid giving Beijing a pretext to escalate the conflict.
Tests of a“Quasi-Quarantine” Model
The broader pattern suggests that Beijing is testing a “quasi-quarantine” model in waters under Taiwan’s control. In a recent Jamestown Foundation analysis, Dr. Ying Yu Lin, a Taiwan-based expert on the People’s Liberation Army (PLA), argues that China is using its coast guard, maritime patrol, and other government vessels to create the appearance of administrative control without declaring a formal military blockade or launching a high-profile military exercise.
As part of Beijing’s broader gray-zone campaign against Taiwan, this “quasi-quarantine” operation is designed to normalize China’s maritime presence, test Taiwan’s operational response, and shape the maritime lawfare and psychological environment for future coercive actions.
In a recent interview, Bonnie Glaser, managing director of the Indo-Pacific Program at the German Marshall Fund, also cited the Dongsha and Taiping incidents as part of a “dangerous trend” of pressure tactics China uses to coerce Taiwan and countries that are strengthening ties with Taiwan.
Implications
China’s recent maritime actions around Taiwan-controlled waters, including Dongsha, Taiping, and waters east of Taiwan, are not merely a rehearsal for a possible quarantine or blockade. They should be understood as part of Beijing’s broader gray-zone campaign to erode the First Island Chain’s security environment and legitimize Chinese jurisdiction across these waters. As with its artificial island-building in the South China Sea, Beijing is taking incremental actions to create a “new normal” that could later support expanded claims and coercive actions.
Experts have warned that ignoring these operations could allow China to gradually establish a greater presence and perceived jurisdiction around Taiwan-controlled waters, increasing pressure on Taiwan and regional partners. The United States should not underestimate this trend: Beijing is playing the long game to weaken the U.S.-led regional security architecture and undermine core U.S. interests in the Indo-Pacific.
Sources:
[1] Focus Taiwan [2] South China Morning Post [3] Taipei Times [4] Taipei Times [5] Reuters [6] Taipei Times [7] Jamestown Foundation [8] Central News Agency (CNA)
GCTF Strengthens Multilateral Democratic Cooperation Against China’s Transnational Repression
The Global Cooperation and Training Framework (GCTF) hosted a seminar in Taipei, Taiwan, from June 23 to 25, 2026, on strengthening democratic resilience and countering the People’s Republic of China’s (PRC) transnational repression.
This year’s event brought together delegates from 29 countries, including Taiwan’s formal GCTF partners: the United States, Japan, Canada, Australia, and the United Kingdom (UK).
GCTF’s Strategic and Multilateral Value
GCTF is a pivotal, Taiwan-U.S.-launched multilateral platform that helps Taiwan expand its international space by leveraging its policy expertise and strengths. Since its establishment in 2015, the framework has enabled Taiwan to build enduring partnerships on issues of shared concern, including law enforcement cooperation, information security, and media literacy. To date, GCTF has organized 105 international workshops, drawing over 10,000 officials, experts, and civil society representatives from around the world.
The platform’s continued expansion underscores growing international interest in democratic, multilateral cooperation with Taiwan. This momentum is highlighted by the UK joining GCTF as its sixth official partner in 2025, as well as a cumulative total of 27 overseas events across 18 countries by the end of that year.
2026 Theme: Transnational Repression
At the seminar’s opening this year, Taiwan’s President Lai Ching-te called on democracies to strengthen resilience and solidarity. He noted that the free world faces “unprecedented dangers” from authoritarian regimes that leverage emerging technologies and illicit financial flows to sow division across borders.
President Lai emphasized that Beijing’s transnational repression includes overseas surveillance, cyberattacks, and cognitive warfare operations designed to silence critics, undermine trust in democratic institutions, and erode national sovereignty. “No democratic nation can be absent in the fight against this hybridized challenge,” he said.
Platforms such as GCTF have become vital assets for democratic security cooperation in recent years, especially as the PRC continues to weaponize transnational repression to undermine democratic interests and silence critics.
In a similar vein, the U.S. Congressional-Executive Commission on China (CECC), in its recent report titled “Report on the PRC’s Transnational Repression and Malign Influence in 2025,” found that China has escalated its use of transnational lawfare to suppress voices advocating for Taiwan’s sovereignty and independence. This trend is exemplified by the PRC’s extraterritorial criminal investigation of Taiwanese lawmaker Puma Shen as a so-called “diehard Taiwan independence separatist.”
Implications
GCTF demonstrates that Taiwan is not merely a participant in international cooperation, but an indispensable contributor to the democratic community. Over the past decade, the framework has provided an institutionalized platform for Taiwan to share its policy and governance experience with democratic partners.
This year’s focus on transnational repression further highlights Taiwan’s practical contributions. As a frontline democracy facing sustained authoritarian coercion, Taiwan has accumulated unparalleled experience in countering the PRC’s multilayered transnational repression and malign pressure, offering valuable lessons for democracies seeking to develop coordinated responses to authoritarian threats.
Sources:
[1] Taipei Times [2] Global Cooperation and Training Framework (GCTF) [3] U.S. Congressional-Executive Commission on China (CECC) [4] Taipei Times
