BRUSSELS — A year ago, the self-styled global elite gathered at Davos, shaken by the election of Donald J. Trump, who made no secret of his contempt for the multilateral alliances and trade that underpin the European Union.

Then up stepped the Chinese president, Xi Jinping, promising that if America would no longer champion the global system, China would.

European officials and business leaders were thrilled.

But a year later, European leaders are confronted with the reality that Mr. Xi could also be a threat to the global system, rather than a great defender. The abolition of the two-term limit for the presidency, which could make Mr. Xi China’s ruler for life and which is expected to be ratified this week by China’s legislature, has punctured the hope that China would become “a responsible stakeholder” in the global order. Few still believe China is moving toward the Western values of democracy and rule of law.

Instead, many European leaders now accuse China of trying to divide the European Union as it woos Central Europe and the Balkan states with large investments. They are also wary of how China has become more aggressive militarily, in espionage and in its investment strategy abroad — with targets including its largest trading partner in Europe, Germany.