He , believing Niu , serving as acting military governor in his absence , to be capable , repeatedly recommended Niu , and eventually , his military governorship was given to Niu .
Sometime thereafter , Xiao Song was created the Duke of Xu .
Xiao Song , believing Niu , serving as acting military governor in Xiao Song 's absence , to be capable , repeatedly recommended Niu , and eventually , his military governorship was given to Niu .
Sometime thereafter , Xiao Song was created the Duke of Xu .