QuCheng mentioned in previous chapters that he finds it regretful for what happened to Blackies family. I think he can forgive the 4yr disappearance, but he cant forgive the cruel way Blackie has been rejecting Wowo since his return, mostly after Blackie has found out how Wowo cried for him all those years. If Blackie thinks he can come in and sweep away Wowo with his love, he needs to rethink this, because Wowo is not lacking in people who love him. It has to be a hell of a love to take him a away from this family