“We discussed a lot of things, and we’re right back on track,” Mr. Trump told reporters after his session with Mr. Xi on the sidelines of the annual summit meeting of the Group of 20 nations in Osaka, Japan. “We had a very, very good meeting with China,” the president added, “I would say probably even better than expected, and the negotiations are continuing.”

Mr. Trump promised to hold off on his threat to slap new 25 percent tariffs on $300 billion in Chinese imports, and he agreed to lift some restrictions on Huawei, the Chinese technology giant at the center of a dispute between the nations.

In exchange, he said, China agreed to buy a “tremendous amount” of American food and agricultural products. “We will give them a list of things we want them to buy,” he said.