As for what the earliest form of work was… wasn't it very simple? First and foremost it was naturally being a janitor and sweeping leaves. But in all honesty, sweeping the barn, although nice didn't feel like something extra to Di Tou. Leave the place nicer than you found. It was a pretty basic logic, especially if you were a guest in someone else's home. Even if nothing had happened, Di Tou naturally would clean up after himself before he left.