Hong Kong Crossover: Kowloon Walled City, Get Beaten and Grow Stronger

Ye Hao accidentally transmigrated into a fan-fiction world based on Kowloon Walled City. But he was just an unknown underling in a gang! Damn! What a load of crap! Just as Ye Hao was fuming, his System awakened! But when he saw the conditions for leveling up, he was dumbfounded... Huh? What kind of ridiculous setup is this? To get stronger, he has to slap all kinds of big shots in the face? Damn it! He’s just a nobody. He’ll get himself killed if he does that! But who could resist the temptation of such high risks and high rewards? Chan Lok-kwan? The war god of the violent gangs, huh? I’ll give you a good, hard slap! Thirteen? You like showing off and acting cool, huh? Slap!! Big Boss? So what if you have a huge network? So what if you’re ridiculously strong? I’ll slap you anyway!! Tornado... I’ll let you off since you treat me like a brother. Chan Ho-nam, Kwun, Chiang Tin-sang, Tachibana Masahito... You big shots are all stepping stones on my road to the top!