He Xiaofeng is based on who thought of Wu.

According to Fei Da, He Xiaofeng proposed 567. As explained in episode 14 of the first season, Wu's prototype is, and there are three small Ji Ji on his head, so he tied three small Ji Ji to Wu. Assassin Wu is another new work by He Xiaofeng after the series of Little Fat Girl. In addition to being a director, he also worked as the original, screenwriter, lens editor and editor of Wu, and even voiced the leading actor Wu in the animation.