It is not known when Li Yichao was born. He was the second son of Li Renfu. During Li Renfu's rule of Dingnan Circuit, he served as an officer at Dingnan's capital Xia Prefecture.
When Li Renfu died in 933, the officers of the circuit supported Li Yichao to succeed him, and he claimed the title of acting military governor, and thereafter sought to be officially commissioned as military governor from Later Tang. However, Li Siyuan, the emperor of Later Tang, to which Li Renfu was formally a vassal, had long suspected Li Renfu of being in secret communications with Later Tang's northern rival Khitan Empire, and therefore wanted to dislodge Li Yichao from Dingnan. So, he issued an edict commissioning Li Yichao as the acting military governor of nearby Zhangwu Circuit, while commissioning Zhangwu's military governor An Congjin as the acting military governor of Dingwu. He also had Yao Yanchou the military governor of Jingnan Circuit, command 50,000 soldiers, to try to escort An to Dingnan. He also issued an edict addressing the people of Dingnan, stating that he felt that Li Yichao was too young to defend the border region that Dingnan was, stating that if he followed the imperial orders, he would receive the great honors that Li Congyan and Gao Yuntao received and if he disobeyed them, he would received the disasters that Wang Du and Li Kuangbin received. Li Yichao refused to follow Li Siyuan's orders. Rather, he sent his older brother or cousin to defend against the Later Tang attack at Qingling Gate, and also gathered up all Dangxiang tribesmen in his territory for the defense. The Later Tang forces under Yao and An put Xia Prefecture under siege. However, the city walls were said to be exceedingly firm based on original construction by Helian Bobo, and the Dangxiang tribesmen were able to effectively cut offfood supplyroutes of the Later Tang army such that it was difficult to resupply the army. Li Yichao and his brothers went on the citywalls and begged An to withdraw, stating to him: Upon hearing about this plea, Li Siyuan ordered a withdrawal. It was said that from this point on, Dingnan viewed the imperial government lightly, such that whenever there were rebellions against the imperial government, it would get in communications with the rebels to demand bribes in order to aid them against the imperial government.
As military governor of Dingnan
In winter 933, at Li Yichao's request, Li Siyuan formally made him the military governor of Dingnan. In 935, Li Yichao fell ill, and he submitted a petition asking that his brother, Li Yiyin, be put in charge of Dingnan. He died shortly after, and then-ruling Later Tang emperor, Li Congke made Li Yiyin the military governor of Dingnan.
