李克用
In 893, Li Cunxiao rebelled in Xingzhou (邢州; in modern Xingtai, Hebei), prompting Li Keyong to send Kang in a counterattack. Kang performed well in the campaign and was promoted to inspecting grand-guardian (). In spring 894, Li Cunxiao was captured and begged for mercy, claiming that he rebelled only because of Li Cunxin's false accusations. Li Keyong valued Li Cunxiao and wanted to spare his life. Even as he sentenced Li Cunxiao to death, he believed that other generals would beg on Li Cunxiao's behalf, but nobody did. After Li Cunxiao's death, Li Keyong became very depressed. Later that year, during a banquet in Jinyang (晉陽; modern Taiyuan, Shanxi), Li Keyong happened to mention Li Cunxiao during a conversation and cried uncontrollably. Kang responded by insulting Li Cunxiao's character. Furious, Li Keyong drew his sword and seriously injured Kang, also ordering his imprisonment. Kang was already dead when Li Keyong decided to release him.