A trade pact with 14 other Asian nations. A pledge to join other countries in reducing carbon emissions to fight global warming. Now, an investment agreement with the European Union.China’s leader, Xi Jinping, has in recent weeks made deals and pledges that he hopes will position his country as an indispensable global leader, even after its handling of the coronavirus and increased belligerence at home and abroad have damaged its international standing.In doing so, he has underlined how difficult it will be for President-elect Joseph R. Biden Jr. to forge a united front with allies against China’s …
