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China & Taiwan Update, September 25, 2026

ISW · Institute for the Study of War ·

Executive Summary

The US and PRC agreed to extend a trade truce and discussed AI security during a summit, but China intensified its rhetoric on Taiwan independence. Meanwhile, a former US soldier pleaded guilty to spying for the PRC, seeking military secrets like HIMARS manuals. Taiwan and the Philippines are enhancing maritime cooperation, which the PRC views as a threat to its regional ambitions.

Why It Matters

This document highlights the complex and often contradictory dynamics of US-PRC relations, particularly concerning Taiwan, and reveals ongoing Chinese intelligence efforts against US military assets and regional efforts to counter PRC coercion.

Key Takeaways

  • China is escalating its diplomatic pressure on the US regarding Taiwan's independence, shifting from
    Source evidence · PDF page 2
    Xi warned Trump on September 24 to ·oppose· ·Taiwan independence,· the first time he has used such direct phrasing.[18] The PRC typically warns the United States not to ·support· ·Taiwan independence.· This wording change, while minor, could represent a renewed PRC effort to change US policy on Taiwan.
  • not support
    Source evidence · PDF page 3
    Duan recruited two active-duty soldiers to gather US military secrets for the PRC from 2021 to 2025, including technical manuals on high mobility artillery rocket systems (HIMARS), information on Bradley and Stryker fighting vehicles, and information on US military readiness for a potential conflict with the PRC.[32]
  • to
    Source evidence · PDF page 4
    Taiwanese media reported on September 22 that an unnamed source confirmed reports that the Taiwanese Coast Guard Administration (CGA) had transferred a decommissioned patrol vessel to the Philippine Coast Guard (PCG).[38] The vessel is a 500-ton patrol ship that was in service with the CGA since 2008.[39] Taiwan typically only transfers decommissioned vessels to states that officially recognize Taiwan·s statehood, which the Philippines does not.[40]

Strategic Relevance

The document outlines the ongoing strategic competition between the US and China, focusing on Taiwan's sovereignty, military intelligence, and regional influence. It highlights China's diplomatic and intelligence efforts to undermine US-Taiwan relations and expand its regional ambitions, while also showing how regional actors like the Philippines and Taiwan are strengthening cooperation to counter Chinese coercion.

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Key Entities

ChinaTaiwanUnited StatesXi JinpingDonald TrumpPhilippinesPeople's Liberation Army (PLA)HIMARSTaiwan Coast Guard Administration (CGA)Philippine Coast Guard (PCG)

Best For

Policy MakersIntelligence AnalystsDefense StrategistsRegional Specialists

Related Themes

Indo-Pacific SecurityUS-China RelationsTaiwan Strait DynamicsMilitary EspionageMaritime SecurityRegional Alliances

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