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?
A Bucket of Water
To put it nicely, he was a bit slow in figuring things out. To put it plain and simple, he was an idiot when it came to self-realization. As for Li Chang Hu, he was good at many things but unfortunately when it came to emotions and dealing with his brother, he turned into a stiff brick and couldn't help but nag. So he was unable to help Li Chang Yin there.
Nagging, in concept is a good thing, after all you're just saying an extra two words out of concern and wishing for things to turn out better for the recipient, but with the exception of a select few people who can bear with it, and take it to heart, for the majority of people nagging was just too d*mn annoying to take seriously.