Gu Junzhu chuckled, "I've said it before, you haven't wronged me, you're just unlucky to have an ignorant father... But, Yanbing, I still need to make things clear with you, this is the first and also the last time. You better make sure he stays far away from now on, doesn't trouble me anymore, otherwise, I won't let it slide a second time, next time he won't be so lucky!"
"I swear!" Duan Yanbing immediately expressed his stance, "Fifth Brother, I promise, if there's a next time, you won't have to do anything. I'll take revenge for you."
Gu Junzhu chuckled again, patted his shoulder, "Anyway, congratulations on finding your biological father."
His brother has always been unlucky, always alone and lonely.
Having found his biological father, although his father is somewhat a bastard, seeing how Duan Yanbing could still defend him, it shows his father isn't all that bad towards him.