吴三桂
On 18 May 1640, Wu Sangui met the Qing army in battle at Xingshan. Jirgalang led 1,500 soldiers to accept the surrender of the Mongolian people, but they were spotted by general Liu Zhaoji when passing the Ming army. Liu Zhaoji led 3,000 soldiers against the Qing army. At that time, Wu Sangui was stationed in Songshan and brought a 3,000-strong force the moment he heard the news. From Jinzhou, Zu Dashou sent more than 700 soldiers as a reserve. At first, the Ming army seemed more powerful with superior numbers; but, after the pursuit of Jiamashan, the Qing army was able to surround Wu Sangui.