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In this analysis
Trade disputes can be settled with quantities, tariff schedules and market access. Taiwan cannot. As Xi Jinping presses Donald Trump over American arms sales to Taipei, the issue exposes a hard limit on transactional diplomacy between the world's two most powerful states: some bargaining chips are also commitments that define the regional balance of power.
Beijing is expected to invoke the 1982 US-China communiqué in which Washington stated an intention to reduce arms sales over time. But the historical record also contains Ronald Reagan's accompanying position that reductions depended on China's continued peaceful approach to Taiwan. The disagreement is therefore not simply over whether an old promise exists. It is over the conditions attached to it and the security environment that has developed since.
Why Taiwan is different from a trade concession
The United States maintains no formal diplomatic relationship with Taiwan but is bound by domestic law to provide the means for its self-defence. Beijing regards the island as Chinese territory and opposes US arms sales. Taiwan's government rejects Beijing's sovereignty claim. Those positions create a structural conflict that cannot be resolved by the same bargaining logic used for soybeans or tariffs.
Trump has also described a delayed arms package as negotiating leverage. That may increase short-term bargaining power, but it introduces ambiguity into a security relationship where ambiguity already performs a deliberate strategic function. There is a difference between preserving uncertainty about how the United States would respond to conflict and creating uncertainty about whether agreed defence deliveries themselves are negotiable.
The summit tests the limits of transactional statecraft
State & Power's conclusion is not that compromise is impossible. Washington and Beijing have strong reasons to prevent conflict and can negotiate military communication, crisis procedures and the pace or composition of specific policies. But Taiwan demonstrates why great-power relationships cannot be reduced entirely to transactions. Credibility accumulates across decisions.
If Washington trades a security measure for cooperation elsewhere, allies will evaluate not only the immediate bargain but what it implies for their own commitments. Beijing, meanwhile, has incentives to discover which American positions are fixed and which can be moved through concessions on unrelated issues.
What to watch after the summit
The useful evidence will be concrete: whether the delayed US arms package moves, whether existing deliveries continue, how the White House describes the 1982 communiqué and whether Beijing changes military activity around Taiwan. A summit statement can lower the temperature. Those decisions will show whether the underlying balance has moved.