Geng Zhongming
In September 1631, the Later Jin dynasty of the Manchu people laid siege to the northern fortress of Dalinghe. Sun ordered Kong Youde to reinforce Ming general Zu Dashou, who was trapped at Dalinghe. Rather than join the battle, Kong decided to loot the surrounding countryside instead. In February 1632, Kong Youde attacked Sun's garrison at Dengzhou, where Geng Zhongming was stationed. Geng turned on Sun Yuanhua, and Dengzhou fell to Kong Youde's assault. Among the casualties of the battle were several of the Portuguese artillery specialists from Macau who had been training the Ming troops. Kong and Geng took the Western cannons. Sun was allowed to leave unharmed, but was subsequently executed for desertion after arriving at the Ming capital of Beijing.