China and the U.S., Still Adversaries, Are Talking. That’s a Start.

Treasury Secretary Janet L. Yellen came to China amid hopes that the United States could restart a relationship that has been deteriorating for years and had gotten off the rails recently over significant points of tension — including the war in Ukraine, a Chinese spy balloon that flew over U.S. territory and was shot down by the American military, and the two countries’ escalating exchange of restrictions on trade.

After 10 hours of…