《梦溪笔谈·故事一》
经略司、安抚司不设置副职，是因为地方的军事统领之权不可不专擅。
经略、安抚司不置佐官，以帅权不可更不专也。
The Bureaus of Military Strategy and Pacification do not have deputies because the military command of the region must not be held concurrently.