Zhou Xian is an inferior bate, he is a bit clumsy and a bit stupid. With the idea of repaying kindness with his life, he followed Xie Linyuan back home.
Xie Yusu is a father's boy. What he hates most in his life is others getting close to his father.
Unexpectedly, his father actually brought an older brother back from outside, saying it was to take care of him.
A mere inferior Bate still wants to be his brother Xie Yusu, so he should take a pee and reflect on his own virtues without a mirror.
In short, he wanted to drive away Zhou.
Later...
Xie Yusu: Zhou Xian, don't leave, I can't live without you.
Zhou Xian: Let me go. I have repaid my kindness.
Purpose: Don't bully young people into poverty.