The surprise move, revealed in a proposal to amend the constitution, is the boldest yet by Xi as he seeks to strengthen the party’s control over a modernizing society and restore China to what he considers its rightful place as a global power — an agenda that his allies have suggested requires his personal leadership.

He has pressed China’s claims over the South China Sea, begun a global infrastructure plan called the Belt and Road Initiative, drastically reorganized the military, bulked up domestic security and enforced ideological purity in schools and media — all parts of his vision of China as a prosperous, respected player on the world stage that stays faithful to its Communist and Confucian roots.

The timing of the announcement startled even experienced observers of Chinese politics: Xi completes his first term as president next month and could have waited until late in his second term to act. He also could have stepped down after his second term and run the country from behind the scenes, as some of his predecessors have.

The constitution limits Xi, who became president in 2013, to two terms in that office, amounting to 10 years. But the party leadership has proposed removing the line that says the president and vice president “shall serve no more than two consecutive terms,” Xinhua, the official news agency, reported Sunday.

By moving so early in his tenure, Xi, 64, is in effect proclaiming that he intends to stay in office well past 2023, overturning rules of succession in Chinese politics that evolved as the party sought stability.

“Xi Jinping will certainly continue,” said Zhang Ming, a retired historian at Renmin University in Beijing. “In China, he can do what he wants to do, and this is just sending a clearer signal of that.”

This article originally appeared in The New York Times.

CHRIS BUCKLEY and KEITH BRADSHER © 2018 The New York Times