657 BC—The Li Ji Unrest is a series of events from 657BC to 651BC that takes place during the Spring and Autumn Period, caused by Li Ji, the concubine of Duke Xian of Jin, in order to put his son Xiqi onto the throne of Jin.
652 BC—Guan Zhong urges the Duke of Qi to maintain the respect of the other states by refusing the offer of the son of a recently defeated state's ruler to ally himself with Qi if Qi would help him depose his father.