Da Mao's fists relaxed abruptly, he sighed, and said, "The executioner Xiao Dao has a younger brother who's the top dog at our school. I also have some clout there. A few days ago, during a gang fight, I badly injured Xiao Dao's brother. As a result, Xiao Dao showed up with a bunch of his brothers to chase and beat us from the Little Red Flower Gang."
Schoolchildren fighting in groups is like three-year-olds playing house, the toughest thing being fist to fist, and at most someone may pick up a brick to knock down their opponent. Any serious injuries would usually be superficial head wounds with blood. That's not a big deal.
But mixing it up outside of school, with those hustling for money, be it one-on-one or a brawl, is no simple matter. The lightest outcome is disability, and if things escalate, as long as you don't kill anyone, the boss will have your back. But if a life is lost, the police will come to personally escort you, and life goes on smooth and carefree.