Interest is growing as to whether or not Chinese President Xi Jinping will attend the Asia-Pacific Economic Cooperation summit in San Francisco on Nov. 14. But if Xi does attend, President Joe Biden should meet with him. There's one caveat: The U.S. should not make concessions simply to get Xi and Biden in the same room. Beijing revels in its attempts to link irrelevant concerns for its own interest. In return for its carbon reduction commitments, for example, Beijing often demands technology concessions. As the APEC summit approaches, Beijing wants to leverage a Xi meeting to extract U.S. concessions on...