Doraemon: Unlimited Ability Tapes

If you were given one of the props in Doraemon's world, what would you choose? Any door? Or a time machine? What Wang Mu wants to own most is Doraemon's ability tape. Each tape inside can help you become a master in a specific field. But each type of tape can only be used for two hours, so what if each type of tape can be used unlimitedly? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.