By Thursday, a number of ranking party members with years of experience following Chinese politics were generally in agreement that Mr. Xi, 59, had suffered either a mild heart attack or a stroke, forcing him to cancel his appointments.
Plans for the political agenda and some slots in the new leadership have been tightly contested and closely held. Several people with ties to top leaders usually aware of details for the party congress said they did not even know the event’s starting date until shortly before it was announced.