You can find iron fists at the cobbler's back door after dusk. You can fool the cobbler with an iron fist, or you can drive it away.

Sha Shao wants to be the main task of making fake money. There is a branch line to help Shashao cobbler drive away gangsters and then fight them according to the prompts. After all boxing tasks are completed, he can sit in the King of Kalman boxing match in the novice village.