Emperor Modi of Jin (r. February 9, 1234) was the last emperor of the Jin Dynasty. Ruling for less than one day on February 9, 1234 before being killed by the Mongols in the Siege of Caizhou, he is the shortest-reigning monarch in Chinese history.
The Mongols besieged Caizhou in 1234, which is now Runan in Henan. On the night of February 8, Aizong decided to flee from the town, and asked Chenglin to be the next emperor.
On the next day during coronation, the Mongolians had already broken the city walls. Aizong fled, and Modi tried to reinforce the palace but failed. He was killed by the Mongolian forces who entered the palace later that day.