Xia County was a key point for transportation of supplies to the Tang capital Chang'an .
Xia County was said that while Liu did not supervise the transportation of supplies through his county in a harsh manner , the supplies were nevertheless always on time .
Xia County was a key point for transportation of supplies to the Tang capital Chang'an , and it was said that while Liu did not supervise the transportation of supplies through his county in a harsh manner , the supplies were nevertheless always on time .