Biden put a personal touch on the engagement — potentially the last of the group before he leaves office on Jan. 20 — by opening his home in Wilmington, Delaware, to each of the leaders and hosting a joint meeting and formal dinner at the high school he attended more than 60 years ago.

President Joe Biden is spending the final months of his term tightening the screws on China, capping an approach that has seen him carry out a difficult juggling act in office to counter the world’s second largest economy.