A third five-year term as party leader would break an unofficial two-term limit that was instituted to try to prevent the excesses of Mao’s one-person rule, notably the tumultuous 1966-76 Cultural Revolution, under which Xi suffered as a youth.

“The congress calls on all party members to acquire a deep understanding of the decisive significance of establishing comrade Xi Jinping’s core position on the party Central Committee and in the party as a whole and establishing the guiding role of Xi Jinping Thought,” said a resolution on the constitution approved at Saturday’s closing session.