洮河
In 224, Cao Pi ordered Du Ji to assist in building his fleet for attacking Eastern Wu. Du Ji was in charge of the imperial tower ship, the fleet's central flagship. While testing the ship on the Tao River (), Du Ji's crew encountered heavy winds and the ship sank. Du Ji drowned in the river. Cao Pi is said to have wept upon hearing news of Du Ji's death, and wrote that he "epitomised loyalty". Du Ji was posthumously granted the office of Minister Coachman (), which his son Du Shu () inherited.