The Legendary Janitor
Most people don't choose reincarnation. Reincarnation finds their way to them. Perhaps they did something great in their life. Or maybe truck-sama wasn't looking where it was going. But without fail, those who reincarnate are destined for something great. A new life where everything changes for the better. But... Reincarnation isn't always the greatest thing. Sometimes you just draw the short end of the stick. Di Tou just happens to have drawn the shortest stick. Pulled out of his life randomly. Taken by a crazy old eccentric man not as a disciple, but as a body double?! And a janitor body double no less?! Grasping a system to find... It's a JANITOR SYSTEM!? Truly, how unlucky can one get?
Limits of Strength
Naturally, Di Tou had no such intention of hiding in a small world, but the path he was taking was also very different. Although he wasn't quite sure what Earth would be considered as, seeing as there were no supernatural powers and Qi, at the very least, he was fairly sure it wasn't a normal small world, as what little he knew about small worlds revealed that they had incomplete laws and structures, often appearing fantastical in nature. As for those with more firm laws, their size would diminish. It was like creating a vacuum to explore the laws of gravity and energy and the such. With fewer variables and less size, it was easier for the laws to run smoothly.
For instance, Qian Jiang Shan's little reflection world, which mirrored the main world in both design and structure, didn't span too far, simply stretching a bit beyond a mountain. While this seemed like a decent size, that was only in reference to humans. This was an entire world we were speaking about!