Shen Shikui was well ensconced in Ka Island's fortifications and hammered his attackers with heavy cannon for over a month. In the end, Ming and Korean defectors including Kong Youde landed 70 boats on the eastern side of the island and drew out his garrison in that direction. On the next morning, however, he found that the Qing—"who seem to have flown"—had landed to his rear in the northwest corner of the island in the middle of the night. Shen refused to surrender, but was overrun and beheaded by Ajige. Official reports put the casualties as at least 10,000, with few survivors. The Ming general Yang Sichang then withdrew the remaining Ming forces in Korea to Denglai in northern Shandong.