U.S. and Chinese delegations met in Madrid for a second day on Monday, extending their fourth round of talks in four months amid trade tensions and a looming September 17 deadline for ByteDance to divest TikTok’s U.S. operations. Day one wrapped after roughly six hours without signs of breakthrough. Discussions centered on TikTok, tariffs, and the broader economy. The talks follow a July meeting in Stockholm where both sides extended a 90-day truce that eased triple-digit retaliatory tariffs and restarted China's rare-earth exports to the U.S.