The summit between US President Donald Trump and Chinese President Xi Jinping did not mark reconciliation. It confirmed that US-China relations remain in a phase of managed rivalry, where both sides seek stability, but neither is prepared to surrender core interests. The summit took place amid converging global fault lines: Iran, Taiwan, trade, rare earths, artificial intelligence, semiconductor controls, energy security and the future balance of power in the Indo-Pacific.

For Trump, the summit was about extracting deliverables from a position of strength: trade returns, supply-chain stability, energy security and possible Chinese pressure on Tehran. For Xi, the meeting was used to send an unmistakable warning that while Beijing may accept trade bargains and tactical stabilisation, it would not tolerate Washington crossing China’s red line on Taiwan.

Xi’s reference to the Thucydides Trap was therefore strategic, not accidental. It framed the rivalry as a historical test between a rising China and an established America, while placing the burden of restraint on Washington. The message was clear: China’s rise is inevitable and its position irreversible. Any American attempt to block Beijing over Taiwan, technology or regional influence would be portrayed as Washington’s refusal to accept a changed world order.

Taiwan remains the most dangerous unresolved issue. Beijing’s objective is not necessarily to force an American reversal, but to push for gradual erosion: slower arms deliveries, softer US language, fewer public commitments and a perception that Taiwan is negotiable.

This is where Trump’s strategic ambiguity matters. By refusing to give Xi direct assurances on arm sales to Taiwan, Trump preserved his leverage. Despite praise for Xi and a more accommodating tone, Washington did not surrender its most important card.

Iran gave Xi another source of leverage. China depends heavily on Gulf energy flows and does not want escalation in the Strait of Hormuz. Yet Beijing also benefits from Iran as a strategic tool: Iran diverts US attention from the Indo-Pacific and strengthens China’s image as an alternative diplomatic pole.