Gu Xietian's expression suddenly turned bitter. "He hated me back then, so much so that he refused to use his own family name and changed it to his mother's surname instead. No matter which name he calls himself, he is still your brother. He is still my son."
Curiously, Gu Xijiu looked at him with bright eyes. "I am not quite sure about what happened between you and Tiannuo. What made him hate you so much?"
Gu Xietian rubbed his temples. "I was blinded. I mistreated him as a way to make his mother angry. I am sure that his feelings were greatly hurt. He used to be a sensitive child. After his disappearance, I fell into deep remorse for what I did to him. I have been thinking about him all these years, hoping that we could meet again."