In the summer of 490 BC, the 58th year of Duke Jing's reign, the crown prince of Qi died.
In the same year Duke Dao killed Bao Mu for trying to incite rebellion among the Qi princes.
[2][3] In 485 BC, the fourth year of Duke Dao's reign, the states of Wu, Lu, Zhu and Tan (郯) invaded Qi.
When the obituary reached King Fuchai, he suspended the campaign and for three days cried outside the army camp, according to the etiquette of the time.
After the mourning period was over, Fuchai launched a naval attack on Qi, but was defeated and forced to retreat.