Li Xilie
In 783, with Li Xilie the military governor ("Jiedushi") of Huaixi Circuit (淮西, headquartered in modern Zhumadian, Henan) rebelling against imperial rule, Emperor Dezong, believing that the armies sent against Li Xilie needed a supreme commander to coordinate their actions, commissioned his son Li Yi (李誼) the Prince of Pu to be the supreme commander of the forces against Huaixi, and he gave Xiao the honorary title of minister of census (戶部尚書, "Hubu Shangshu"), to serve as the secretary general for Li Yi.