[1][2] When Duke Huan died in the tenth month of 643 BC, the six princes fought each other for the throne.
During the unrest Duke Huan's corpse lay unattended for 67 days, and it was so badly decomposed that worms crawled out of his room.
In the third month of 642 BC, Prince Zhao returned with the army of Duke Xiang of Song.
However, Duke Xiang of Song refused to acknowledge Qi's hegemony as he aspired to be the hegemon himself.
After he died in 633 BC, Prince Kaifang (開方) of Wey, who had been a trusted official of Duke Huan, killed Duke Xiao's son and helped Prince Pan usurp the throne.