I have a pen and a knife. The prodigy's apprenticeship with Liu Gongquan is a fable. The famous saying that comes to mind in the story of the child prodigy's apprenticeship with Liu Gongquan is that he has learned a lot since childhood and has high ambitions throughout his life. Others carry swords, I have a pen and a knife. This story tells us that in order to succeed in learning and doing things, we must work hard, study hard, and guard against arrogance and impetuosity.