He had always known that if he wanted to resolve this matter fundamentally, the only solution would be if his grandfather was not biologically related. But he had never actually thought that his grandfather was really not related by blood. He had merely considered lying about how his grandfather was not his biological grandfather to make Mu Huan let go.
However, he eventually gave up on this idea because what was a lie was ultimately a lie. If she were to discover the truth in the future, she would only be in even more pain.
Until a few days ago, when he went to his grandfather's study to look for something, he suddenly recalled that time when he was very young. The words he had heard were probably from when he was three or four years old. Hence, when he recalled the memory, it was only a flash of the past. However, the more he thought about it, the more he felt that there was a problem.