It's not that Gao Yang is ruthless, trying to squeeze every last bit of value from Yarebin, but rather that he's realized it's better for Yarebin to stay busy than to be idle.
People like Yarebin, keeping busy with work, can live a few more years. If they have nothing to do, they'd decline even faster.
Look at Yarebin's behavior at home; you can tell he doesn't know how to live a normal life. Asking an over-eighty-year-old to learn and adapt to a new life is really not as good as letting him do what he wants and live the life he desires.
Gao Yang looked at Yarebin with expectation and said, "Teacher, you have to help me."
Yarebin nodded with a smile, but soon after nodding, he hesitated.
After a moment of thought, Yarebin said to Gao Yang, "What do you plan to do?"
Gao Yang was stunned and said, "What to do? I, I don't know, so I really need your help, Teacher."
