In 934, Li Congke overthrew then-emperor
Li Conghou (his adoptive brother and Li Siyuan's biological son) and became emperor. He created Liu Yanhao's sister Lady Liu empress. Because of his status as the empress' brother, as well as his reputation for being kind and tolerant, Li Congke initially commissioned Liu Yanhao as the director of palace grounds (宮苑使,
Gongyuanshi), and then the more important office of director of palace affairs (宣徽使,
Xuanhuishi). In 935, he commissioned Liu as the minister of justice (刑部尚書,
Xingbu Shangshu) and chief of staff. Shortly after, he commissioned Liu as the military governor of Tianxiong Circuit (天雄, headquartered in modern
Handan,
Hebei). It was said that, after Liu took over the Tianxiong command, his disposition changed. He seized many people's properties and spent much time in feasts. He also did not regularly provide salaries to his soldiers, leading to much resentment from them. In summer 936, by which time Li Congke's brother-in-law
Shi Jingtang (the husband of Li Siyuan's daughter
Princess of Jin) the military governor of Hedong Circuit (河東, headquartered in modern
Taiyuan,
Shanxi) had rebelled against Li Congke, Liu's officer Zhang Lingzhao (), seeing the soldiers' resentment, led a mutiny against him, intending to seize Tianxiong and join the Hedong rebellion. Liu fled to the capital
Luoyang. Li Congke, in anger, wanted to exile him. However, with Empress Liu interceding for him, Li Congke only removed him from his posts and ordered him back to his mansion. (Zhang's mutiny was later suppressed by
Fan Yanguang.) However, he did not appear to completely fall out of favor with Li Congke, as later in the year, after the general
Zhang Jingda, whom Li Congke had initially sent against Shi, was defeated by the joint forces of Shi and his backer,
Emperor Taizong of Later Tang's northern rival
Khitan Empire, Liu, along with
Zhang Yanlang and Liu Yanlang (), were said to be proponents of Li Congke personally leading an army against Shi. == Death ==