King Zhaoxiang of Qin
Because King Zhaoxiang had not yet legally come of age (traditionally at the age of 20), his mother, who was now known as Queen Dowager Xuan, became the regent. She was supported by her brothers, Wei Ran and Mi Rong (羋戎), as well as two other sons, Prince Yi (公子悝) and Prince Fu (公子巿), the four of them collectively known as the "Four Nobles" (四貴).
Duke Qing of Qi
Duke Qing was the son of Duke Hui of Qi and grandson of Duke Huan, the greatest leader of the State of Qi. He succeeded his father, who died in 599 BC after a ten-year reign. Duke Hui had favoured the official Cui Zhu (崔杼). After Duke Hui's death the powerful Gao and Guo clans of Qi expelled Cui, who fled to the State of Wey. Cui would later return to Qi and cause great turmoil in the state.