Different World: There Is No Solution System at the Beginning

What, the boy actually traveled through time, or is he the Hokage? "Achievements are rewarded - Sharingan" Wait! Why is there still a system? "Mission reached level - Enter the world, One Piece" The boy's name is Zhang Junrui. At the beginning, he travels to a different world and comes with an unsolvable system! He has experienced Naruto and Pirates successively, and there are more worlds waiting for him to explore! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.