A Eunuch Bound to the More Children, More Blessings System

Wei Dabao was enjoying the perks of freelance life when a big truck hit him, causing him to transmigrate to a feudal dynasty. His soul entered the body of a little eunuch who had just died from the pain of being castrated. This was so unfair! Everyone else who transmigrated became royalty or nobles, so why was he a real eunuch? And the damn System was a more children, more blessings System. How was he supposed to play this game?