"If we solely rely on the Government Office to capture these petty thieves and bandits, wouldn't that kill Li Chang from exhaustion?"
Hence, places like the Martial Arts School were established, specifically for training men who were skilled in martial arts.
Some Martial Arts Schools would recruit children from poor families who aspired to become fighters, offering them food and shelter, a far better deal than starving at home. Thus, there were quite a few of such people. Besides, after completing their training, they might even be selected by wealthy households, leading to a more promising future.