Taiwan Strait developments — 25 October 2026
The pressure this week ran through the coast guard lane, not the air lane. Taiwan's coast guard reported Chinese coast guard and research ships in four areas around the island on one day, an entry at Pratas by a coast guard ship sailing with its tracking system off, and five Chinese coast guard ships shadowing eight Japan Coast Guard ships that were sheltering from Typhoon Champi in the strait, which Taipei called an attempt to create a false impression of jurisdiction. The Taiwan Affairs Office called its Pratas patrols lawful law enforcement and announced no widening. The PLA air lane stayed in pattern: one designated patrol, paired with far-seas training, and then four daily reports in which no PLA aircraft were detected. No boarding, inspection or closure area, no named exercise and no new Taiwan Affairs Office measure; the Army ended its brigade exercise a day early ahead of the typhoon.
The developments
Taiwan's coast guard reported Chinese coast guard ships in four areas at once, a Pratas entry with tracking switched off and the shadowing of eight sheltering Japan Coast Guard ships, while Beijing called its Pratas patrols lawful law enforcement
On 18 October Taiwan's Coast Guard Administration reported Chinese coast guard ships, research ships and a fishing flotilla operating the same day east of Hualien, south of Pingtung, south-west of Kaohsiung and around Pratas: twelve ships and four fishing boats in all. The research ship Tansuo-3 entered restricted waters east of Hualien; Beidiao 996 entered them south-west of Eluanbi and turned away after twelve warnings; Haiyang Dizhi 8 and a Chinese fishing boat interfered with a Taiwanese fishing boat south-west of Kaohsiung; and China Coast Guard 3301 and 3303 were driven out of the Pratas restricted waters at about noon, ending the standoff that began on 16 October. On 20 October China Coast Guard 3102, sailing with its tracking system (AIS) off, entered the restricted waters north-east of Pratas at about 08:00 and told the Taiwanese cutter shadowing it, by radio, "your so-called Republic of China does not exist". The coast guard counts twelve expulsions at Pratas in 2026, with fifteen ship-sorties; its release said the standoff was continuing, and it had published no end to it by 25 October. On 21 October the Taiwan Affairs Office spokesperson, Zhang Han, asked whether control around Pratas would widen, said China has sovereignty over the South China Sea islands "including the Dongsha islands" and that the coast guard's law-enforcement inspection patrols there are lawful performance of duty. No widening was announced. From 06:00 on 22 October eight Japan Coast Guard ships sheltering from Typhoon Champi sailed along the strait's median line to waters south-west of Qimei, in Penghu, outside Taiwan's contiguous zone, and five China Coast Guard ships followed them: 2304, 2305 and 2308 of the 3,000-tonne class and 2501 and 2502 of the 5,000-tonne class. On 23 October Taiwan's coast guard called on Beijing not to exploit the typhoon to create a false impression of jurisdiction, or that the strait is internal waters. Neither the PRC foreign ministry nor the Taiwan Affairs Office had commented by 25 October, and no Japanese statement was found. Separately, Reuters, in a report the Taipei Times carried on 24 October, cited a coast guard statement that China is pairing suspected militia boats with coast guard ships for "battlefield preparation" around Taiwan and into the western Pacific. The incident behind it is dated 16 August, when the suspected militia boat Minfudingyu 07902, with a coast guard ship and a research ship, came about 2.7 nautical miles outside Taiwan's restricted waters off the Pacific coast.
Why it matters. The week widened the geography of the coast guard lane, not its kind. Four areas on one day, an entry with tracking off and the shadowing of another state's government ships in the strait each assert jurisdiction by presence and by language. None involved a boarding, an inspection or a closure area, which are the steps that would make presence enforcement, and none touched traffic bound for Taiwan's main ports. The Japanese episode follows the weather-event pattern this module recorded in August, when Chinese state media announced traffic-control measures in the strait during a typhoon; the reading of it as a claim of jurisdiction is Taipei's, and Beijing has said nothing. The Taiwan Affairs Office's language applies law enforcement and inspection to an outlying island, as earlier statements did. The militia statement reports Taiwan's reading of a two-month-old incident and is not a new one. The item establishes nothing about a blockade rehearsal, which is the coast guard's interpretation, or about intent. What would change the reading is one boarding or inspection of a vessel bound for Kaohsiung, Keelung or Taichung, or a PRC statement claiming authority over foreign government ships in the strait.
- 中國海警與科研船多點齊發侵擾我海域 海巡署全程監控強勢驅離守護國家主權 (China Coast Guard and research ships in a multi-point incursion)
- 中國海警船關閉AIS侵擾東沙水域 海巡台中艦併航驅離 強勢廣播回擊統戰言論 (China Coast Guard ship enters Pratas waters with AIS off)
- 国务院台办新闻发布会辑录（2026-10-21） (Taiwan Affairs Office press conference, 21 October 2026)
- 8 Japan Coast Guard vessels shadowed by China near Penghu: Taiwan
- CGA urges Beijing not to use typhoons to assert jurisdiction
- China using militia boats to ramp up war readiness (Reuters)
One designated PLA patrol, paired with far-seas training on 20 October, was followed by four daily reports in which Taiwan's defence ministry detected no PLA aircraft
On 20 October Taiwan's defence ministry designated a PLA joint combat readiness patrol together with "far-seas long-range" training. From 10:43 it detected 27 aircraft, including J-10, J-11, J-16, JH-7, H-6 and KJ-500 types, 21 of which crossed the median line or its extension, in the northern, central and south-western areas and in the western Pacific airspace. It was the fourth designated patrol of October, after the 6th, 9th and 14th. The daily reports, each covering 06:00 to 06:00, counted 5 aircraft for 18–19 October, 14 for 19–20 October and 29 for 20–21 October. The next four reports, covering 21 to 25 October, said no PLA aircraft were detected; they give no reason. The ministry counted one to seven PLAN ships and five to nine official ships a day across the window. No named exercise was announced. Typhoon Champi brought a sea warning on 21 October and a land warning from 22 October; the ministry opened its top-level disaster response centre on 22 October.
Why it matters. Four designated patrols in October is the top of this year's run of two to four a month and not twice it. The 20 October release named the western Pacific as well as the strait's areas, so the patrol added airspace rather than moving the patrol off the strait, which is the change the cadence observable reads; the pairing with long-range training has a precedent on 2 July. The run of days with no aircraft detected is not new this month: the reports of 3 to 6 October also detected none. A day, or four, is not the marker on the activity baseline; the monthly aggregate is. The item establishes nothing about why no aircraft were detected, and it draws no link to the weather. What would change the reading is a month at zero designated patrols or at twice the run, or a named exercise.
Where this fits
This is one conflict's dated review for the week. The cross-conflict edition for the same week carries the most consequential findings from every conflict Vigil covers. The standing picture this review updates is the Taiwan Strait coverage. How Vigil grades, dates and sources its claims is set out in the methodology, and anything later found wrong is recorded in the corrections log.
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