"Mining as an element is present in many games, but what have they done with it? To complete NPC quests, you mine, maybe get a paltry daily reward; it's gotten to the point where I don't even feel like doing it every day."
"That's already one of the better scenarios. I've seen worse—main questlines that actually make you mine, and you have to dig up a freaking 100 portions. They deliberately slow down player progress. If it weren't for their good character art, I'd have quit playing long ago."
Meanwhile, in the game.
Nu Liu and Zhuangzhuang spent their first day mining until they were completely exhausted, even having to consume a few dishes to restore their energy, and didn't stop until they were nearly out of stamina.
Using up your energy could lead to being carried off to the clinic, so the two of them made sure to leave just a few drops.
In the end, they stopped at the 10th level.
They hadn't reached the 20 levels Nu Liu had in mind.