Ziming spends days trying to solve the Exalting Unity Mohist Cube and is finally told that only the Mohist leader and Master Ban can solve it. When he realises that he can't solve it, he thinks about how everyone is good at something, but he doesn't know what his strength is. Ge Nie talks to him and encourages him to believe in himself, and not give up. Ziming takes his advice to heart and manages to solve the cube, much to everyone else's amazement, and Master Ban's decides to teach him about Mohist mechanisms. (thetvdb.com)