Huo Ling clenched the doorknob tight after he heard what Hao Baiyun said. Then, he soundlessly returned to his bed and pulled the quilt over his head, attempting to sleep. Yet, who is he deceiving? Himself. He can't sleep, especially after he heard what Hao Baiyun said about Yi Bing becoming Liu Lingling to accompany him in this life before Yi Bing would take his soul away when the day of his death arrives.
From what Hao Baiyun said earlier, he learned that his mother became missing when she was young. She was likely abducted. And, no matter how much they search for her, they can't find her. So, they never knew that she had a child – Huo Ling. They didn't even know who was the father of her child.