East Asian age reckoning
Before the succession struggle ended in 250, Quan Cong had already died either sometime between 22 February and 23 March 247 (according to Sun Quan's biography in the "Sanguozhi") or in the winter of 249 (according to the "Jiankang Shilu" and his biography in the "Sanguozhi") at the age of 52 (by East Asian age reckoning).