Wang Dao
The Eastern Jin dynasty's Emperor Ming (323–325), a descendant of Sima Yi, once asked an official named Wang Dao to tell him about the origins of the Jin dynasty, so Wang Dao told him everything from Sima Yi's career to Cao Mao's attempted coup against Sima Zhao. After hearing from Wang Dao, Emperor Ming remarked: "If what you said is true, how can the Jin (dynasty) expect to last long?"