China envoy warns US on Taiwan, human rights red lines ahead of Xi-Trump summit

China's ambassador to the US issued a firm warning that Taiwan and human rights are 'red lines' that cannot be crossed, setting a confrontational tone ahead of the Xi-Trump summit in Washington. The statement signals Beijing's intent to hold a hard line on core sovereignty issues, potentially limiting room for compromise. The summit's outcome remains uncertain, but the rhetoric raises the stakes for any potential concessions.