He was the greatest military genius of the Republic of China era. After his death, he transmigrates into the body of a crime boss's driver.
A driver? Cannon fodder? Not a chance.
While the gangs still settled things with machetes and negotiations, he used the strategy of “concentrating superior forces to annihilate the enemy one group at a time,” a tactic he'd spent half his life applying on the battlefield.
From then on, this unremarkable driver became the mastermind behind the entire underworld.
The crime boss thought he was driving. In reality, he was laying out the board.
This is a one-sided battle of superior technology: using the art of war to play the underworld.