Become the Master of Zhou Botong's Son at the Beginning

Li Fu traveled to "The Legend of the Condor Heroes" and got a system where he can get rewards by accepting apprentices, but he can't accept the protagonist, and the starting system also requires him to accept Zhou Botong's son as an apprentice. This is really embarrassing for me, someone can help me! Infinite Flow, I am talking about the sword, and I plan to write "Qin Man" next