The next morning, Beibei learns that his younger brother, Master Mo Xuan, has come to borrow his all-terrain fort and learn how to use it. Master Mo wants to join the "tang sect," the elite martial arts society, and he offers to teach Master Mo how to operate the fort when he's free. He's willing to risk his life to protect the sect, and the humiliation of being a member of the sect is his own, he says, so he'll do his best to uphold the rules. He gives Master Mo a note, which he can return after he memorizes it, to memorize. The next day, the two of them go to the arena to practice their skills. Master Bo says he wants to challenge Master Mo, but his sister jing says it's okay if he surrenders, but Master Bo wants to wait until Master Mo and Master Bo finish sparring.