 In 926, Li Cunxu, then the emperor of Later Tang, was killed in a mutiny at then-capital Luoyang.Li Siyuan subsequently claimed imperial title.In 927, he made Li Conghou the mayor of Henan Municipality (河南, i.e., the Luoyang region) as well as the honorary chancellor designation "Tong Zhongshu Menxia Pingzhangshi" (), as well as the command of the imperial guards.