PLA helicopters cross Taiwan Strait median line for first time, testing new attack scenarios, experts say

Chinese military helicopters have crossed the median line of the Taiwan Strait for the first time, a move that Taiwanese experts say suggests the People’s Liberation Army (PLA) is testing alternative attack scenarios against Taiwan and expanding its gray-zone operations.

Taiwan’s Ministry of National Defense (MND) said on July 20 that it had detected a PLA helicopter crossing the median line of the Taiwan Strait. 

The following day, the ministry reported that three sorties of PLA helicopters and drones had crossed the median line and entered Taiwan’s air defense identification zone (ADIZ).

It marked the first known instance of PLA helicopters crossing the median line and entering Taiwan’s ADIZ. PLA helicopter activity east of the median line continued for about four days.

The Taiwan Strait median line was established by the United States in the 1950s as an informal buffer intended to reduce the risk of military conflict across the strait. It has never had legal force.

The New York Times reported on July 25 that Beijing has stepped up gray-zone tactics against Taiwan, with Chinese coast guard vessels carrying out what it described as “regularized law enforcement patrols” in waters east of Taiwan, raising new concerns about the potential for a blockade.

On July 28, the American Institute in Taiwan (AIT) posted a photo showing a Taiwan Coast Guard Administration vessel alongside a US Coast Guard cutter. 

AIT said: “The United States appreciates Taiwan’s partnership in maritime security and safety, and supports Taiwan’s meaningful contributions on global issues including maritime law enforcement exchange and international cooperation.”

PLA tests new operational scenarios

Juichou Richard Hu (胡瑞舟), a retired major general and deputy director of the Taiwan Center for Security Studies, assessed that the PLA’s first helicopter crossing of the median line reflects Beijing’s growing emphasis on  “three-dimensional, multi-point landing” operations.

Hu told TCN that helicopters, airborne troops, missiles, amphibious forces, unmanned systems and artificial intelligence could all form part of a future PLA campaign against Taiwan.

Taiwan has long focused much of its defense planning on the PLA’s amphibious landing capabilities, Hu said. 

Hu argued that because the PLA’s capacity for large-scale amphibious transport remains limited, Taiwan could underestimate threats posed by other means of attack.

He said MND maps of recent PLA activity showed helicopters operating not only near the median line but also in airspace north of Taiwan and near Lanyu Island, indicating that their use is no longer confined to a single direction. Instead, the activity appeared to simulate multidirectional, multi-axis operations, Hu added.

Shen Ming-shih (沈明室), a research fellow at Taiwan’s Institute for National Defense and Security Research (INDSR), told TCN that the helicopter crossings remained part of routine PLA training. 

However, he said, helicopters have rarely been used in gray-zone operations, which have previously relied mainly on fighter aircraft, electronic warfare aircraft and naval vessels.

Their involvement suggests the PLA is testing new force employment methods and alternative operational models, Shen said.

The operation served multiple purposes, he added, including testing the role of helicopters in gray-zone operations and preparing for possible cross-Strait military action.

Decapitation risk

A July 15 report by The Telegraph, based on satellite imagery analysis, said the PLA has built full-scale replicas of Taiwan’s Presidential Office Building and other key government facilities, allowing troops to rehearse the seizure of the capital under highly realistic conditions.

MND spokesperson Sun Li-fang (孫立方) said on July 27 that Taiwan had a comprehensive understanding of the PLA mock-ups of the Presidential Office Building, Suao Naval Harbor and other sites. He said the information underscored the severity of the threat Taiwan faces and was being taken seriously by the ministry.

Hu said that, at a helicopter speed of roughly 300 kilometers per hour, a flight from China’s southeastern coast across the Taiwan Strait is feasible. If combined with missile strikes, air-defense suppression and simultaneous amphibious operations, helicopter forces could potentially reach key areas of Taipei in about 30 minutes and launch rapid assaults on critical facilities.

If the PLA first suppressed major air-defense missile positions in northern Taiwan — including Patriot and Tien Kung missile sites — helicopter forces could rapidly penetrate the Taipei metropolitan area, he said.

Integrated into a wider campaign against Taiwan, such forces could conduct what Hu called precise “acupoint-style” strikes against major military and political targets, including Songshan Airport, the Ministry of National Defense, areas surrounding the Presidential Office Building and key underground command facilities, Hu said.

Should the PLA seize major airports such as Songshan, Hu said, it could subsequently use large transport aircraft to airlift troops and equipment into Taipei, significantly increasing the threat to the capital. 

The expanded use of helicopter forces therefore indicates that the PLA’s capability for decapitation operations is continuing to grow, he added.

Focus on waters east of Taiwan

Hu said Beijing has visibly increased its military presence in waters east of Taiwan following the start of consultations between Japan and the Philippines over their exclusive economic zones (EEZs). 

The appearance of PLA helicopters near Lanyu, together with a sharp rise in Chinese coast guard activity, indicates that waters east of Taiwan have become an important direction for Beijing’s recent military deployments, he said.

Hu added that Chinese research vessels had completed seabed topographic and hydrographic data collection in waters east of Taiwan, potentially providing important baseline information for future military operations.

Expanding jurisdictional claims

For Taiwan, Chinese coast guard activity around Kinmen, Matsu and Dongsha, as well as Beijing’s expanding air and maritime operations around Taiwan, serve as both rehearsals for future military action and as legal warfare, Shen said.

Beijing is gradually expanding its jurisdictional claims and operational presence from the restricted and prohibited waters around Kinmen and Matsu and across the Taiwan Strait median line and Taiwan’s ADIZ toward waters surrounding Taiwan proper, he said.

The core objective remains unchanged: to assert that Taiwan and surrounding waters fall under China’s jurisdiction, weaken Taiwan’s sovereignty claims through legal warfare and gradually transform the Taiwan Strait into what Beijing treats as internal waters, Shen said.

Pattern of military exercises

Since then-US House Speaker Nancy Pelosi's 2022 visit to Taiwan, the PLA has conducted seven major military exercises, roughly one every six months over the past three and a half years. 

However, Beijing has not conducted a large-scale exercise encircling Taiwan so far in 2026.

Shen said major PLA exercises have not followed a fixed semiannual schedule. Instead, they have usually been closely tied to specific political events.

Hu expressed a similar view, saying Beijing’s past large-scale exercises were generally responses to important political developments in Taiwan, such as presidential speeches, adjustments in cross-Strait policy or actions Beijing regarded as provocative. Such exercises therefore carried clear political objectives.

The PLA’s military training continues along China’s coast and in other waters, including the Bohai Sea and East China Sea, Hu said. The absence of a major exercise around Taiwan does not mean that China’s military preparations have eased.

Shen said 2026 has been relatively unusual. 

Under previous patterns, President Lai Ching-te’s (賴清德) May 20 anniversary address and subsequent visits to diplomatic allies could both have triggered PLA exercises, yet Beijing has not responded in the same manner.

One possible reason is a relative easing in US-China relations, with Beijing seeking to avoid disrupting engagement with the administration of US President Donald Trump, Shen said. Another factor could be Taiwan’s local elections scheduled for the end of the year.

Beijing has learned from experience that large-scale military exercises can give Taiwan’s ruling party greater opportunity to emphasize its “resist China, defend Taiwan” narrative, potentially intensifying public resentment toward China, Shen said. 

Shen assessed that Beijing may therefore be deliberately reducing the frequency of major exercises to avoid producing the opposite effect.