During a summit, China's leader identified Taiwan as the most critical issue between the US and China, warning that differences over the island could escalate.

At the summit, the Chinese leader placed Taiwan, a key point of friction between the U.S. and China, at the center, calling it "the most important issue" between the two countries. <img alt="China" src="https://npr.brightspotcdn.com/dims3/default/strip/false/crop/1024x683+0+0/resize/1024x683!/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2F25%2Fb9%2F9f0a52904672a8accff0170705ae%2Fgettyimages-2275560944.jpg" /><p>At the summit, the Chinese leader placed Taiwan, a key point of friction between...