In the dream, he couldn't speak and could only stand there blankly. Lin Sen walked slowly from the hazy background, still the same as when he first saw her. The little girl of about ten years old, himself, too, returned to a few years ago. At first, she smiled at him. The smile was very sweet, with a playful flavor. When he looked at her, the corners of his mouth also raised slightly, a very shallow arc. Lin Sen's windchime-like laughter became fainter and fainter, and gradually disappeared. The air around him seemed to become thinner all of a sudden, and the headache began to come again. She was getting closer and closer to him, so close that he could clearly see her curved eyelashes and the two clear tear tracks on her fair face. He began to be at a loss and wanted to step forward, but found that he could not take a step forward. He tried to raise his hand to wipe away the tears that were still flowing for her. His hand was lifted very lightly, as if it was not affected by any gravity. But he found that his outstretched hand could not reach her. She was obviously very close to him, but it was like there was a transparent barrier between them. She was inside the barrier and he was outside the barrier. They could both see each other clearly, but neither could catch the other.