Although Pei Cheng repeatedly insisted he would not go back, when a crisis hit the family, he ultimately could not simply ignore it.
After all, he left home only because he refused to be manipulated, not because he truly stopped caring about the Pei Family.
When all was said and done, he had merely spent a long time being starved of his father's affection, which was why he constantly went against him and did everything his father disliked.
Chapter 138