[1] The Jin capital, Zhongdu (present-day Xicheng and Fengtai districts, Beijing), had been besieged in 1213,[2] then captured by the Mongols in 1215.
In the intervening years, the Jin dynasty moved its capital to Bianjing (present-day Kaifeng, Henan Province).
The Southern Song dynasty had rebuffed Emperor Aizong's plea for assistance, and joined forces with the Mongols.
The Southern Song dynasty ignored Emperor Aizong's warning that they would become the Mongol Empire's next target.
[6] Before his death, he had abdicated his throne to Wanyan Chenglin, a general and descendant of the Jin imperial clan, on February 9, 1234.