In which novel is Bai Mujin the protagonist?

Bai Mujin was not the protagonist of any novel. He was a fictional character that appeared in the plot of some novels. Bai Mujin's name might have come from a novel, manga, game, or movie, but it wasn't a real character. If you have a specific plot or character name, you can tell me. I will try my best to answer your questions.