John Moolenaar, chairman of the House Select Committee on China, urged President Donald Trump to take a hard line in next week’s summit with Xi Jinping, which is intended to stabilize US-China relations. He warned against concessions, called for tighter restrictions on China’s access to American AI and US and allied semiconductor manufacturing technology, and demanded consequences over reports that Chinese entities provided targeting support for Iranian strikes that killed US service members. Moolenaar said China’s ruling Communist Party should understand that enabling adversaries such as Iran "is tantamount to an act of war against the United States and will be met with the most severe consequences." He described China as the United States’ "foremost foreign adversary and greatest external threat." The letter also urged Trump to reject Chinese objections to US arms sales and security cooperation involving Taiwan and maintain pressure over detained US citizens, a practice Moolenaar called "hostage diplomacy." China claims Taiwan as its own, while Washington is obliged by law to provide the democratically ruled island with the means to defend itself. Trump has said Xi raised US arms sales to Taiwan during his May visit to Beijing and later called a pending package worth up to $14 billion a "negotiating chip." People familiar with Chinese efforts said Beijing also hopes Trump will publicly say the US opposes Taiwan’s independence, rather than use Washington’s longstanding formulation that it does not support independence. Any change in that position would be controversial, potentially raising questions about US resolve and prompting congressional opposition. On Sunday, Trump dismissed a report that Iran obtained satellite images of a base in Jordan from Chinese entities before a July attack that killed three US troops, saying China and the US both conduct espionage against each other.