How he carried an unsheathed sword on his back
"Why is your sword unsheathed? Aren't you afraid that it will be exposed to the wind and rain and cold food and sun with you outside, and become a rusty iron early?
"My sword doesn't need to be cared for, just use it to smooth out the injustices in front of me, and if people don't rust, swords don't rust." Putting aside all the troubles, there is no sheath and no binding, I will ride the sword in the wind, and enjoy the world. ”