祖大壽
Zu Dashou was by then in charge of defense in Jinzhou. Zu had surrendered to Qing at the Battle of Dalinghe and offered to take Jinzhou. When he succeeded taking Jinzhou, he switched sides again and took control of Jinzhou. In the 6th year of Chongde (1641) Jirgalang ordered his troops to retake Jinzhou and lay siege to the city. Zu then sent a letter seeking reinforcements from Beijing. In the fourth lunar month, Hong Taiji decided to maintain the siege upon Jinzhou.