Geng Zhongming
Prior to the invasion, Hong Taiji sent Abatai, Jirgalang, and Ajige to secure the coastal approaches to Korea, so that Ming could not send reinforcements. The defected Ming mutineer Kong Youde, ennobled as the Qing's Prince Gongshun, joined the attacks on Ganghwa and Ka ("Pidao"). The defectors Geng Zhongming and Shang Kexi also played prominent roles in the Korean invasion.