Xu Chang'an is a max-level expert, but all he wants is to lie flat.
He takes in a granddaughter, Xu Xiaojuan, whose useless constitution means she has to work herself to the bone to get stronger.
Xu Xiaojuan cultivates desperately every day, while Xu Chang'an desperately lies flat.
Until one day, Xu Xiaojuan works her way to becoming the strongest under heaven. She looks back and sees...
Grandpa is still right where he was, sunbathing without even changing his pose.
Xu Xiaojuan: "Grandpa, can't you try a little harder?"
Xu Chang'an: "Try harder? Aren't I already the strongest under heaven?"
Xu Xiaojuan: "But... you're my grandpa!"
Xu Chang'an: "Exactly. So you're already the second strongest under heaven. I'm quite satisfied."