A graduate student who traveled through the history of the Ming Dynasty actually tore up the imperial edict at the scene of receiving it - just to prevent a border withdrawal that was destined to destroy the country!
Binding the "defend the territory and promote the border system", he ambushed the Black Wind Valley with a hundred old and weak soldiers, captured Prince Wala alive, and overran the city with thousands of horses!
Relegated to a harsh and cold place, he opened mutual markets, grew rare crops, and united tribes. In the forgotten corners of the empire, he set off a lone wolf rise that reversed the fate of the country!