China warned it will cancel a planned September summit with President Trump if Washington approves new arms sales to Taiwan before the meeting, according to diplomatic sources. The ultimatum underscores Beijing's increasingly aggressive stance on the island it considers a breakaway province.

Xi Calls Taiwan a Red Line Issue

Chinese President Xi Jinping told Trump during their May meeting in Beijing that Taiwan represents "the most important issue" in U.S.-China relations. Xi cautioned that mishandling the Taiwan question could trigger a military conflict between the world's two largest economies.

The stark warning came as Trump declined to commit to approving another weapons package for the self-governed island. The American president later told reporters that arms sales to Taiwan could serve as "a very good bargaining chip" in his negotiations with China, raising concerns among allies about long-term U.S. security commitments to democratic partners.

September Summit Hangs in Balance

The threatened cancellation puts diplomatic pressure on the Trump administration as it weighs whether to proceed with a pending Taiwan arms package. Defense officials have prepared multiple weapons proposals for presidential approval, but the White House has delayed action pending resolution of broader trade and technology disputes with Beijing.

Taiwan views the U.S. as its most important defensive partner and relies heavily on American military equipment to deter potential Chinese invasion. The self-governing democracy has purchased billions of dollars in weapons systems including fighter jets, missiles, and naval vessels in recent years as Beijing has ramped up military drills around the island.

Tensions Escalate Over Strait

The summit threat comes amid heightened tensions in the Taiwan Strait. China has sent scores of warplanes toward Taiwan in recent months while conducting live-fire exercises that Taiwanese officials characterize as rehearsals for blockade or invasion scenarios. Beijing has refused to rule out using force to bring Taiwan under its control.

Taiwanese leaders have worked to consolidate international support as Chinese pressure intensifies. The island has strengthened ties with Japan, Australia, and European nations while seeking to preserve its critical relationship with Washington despite Trump's transactional approach to security commitments.

China considers Taiwan a "red line" that cannot be crossed in its relationship with the United States. Beijing views American arms sales as interference in its internal affairs and has consistently threatened retaliation when new weapons packages advance through the approval process.