That morning many years later, she thought of that summer and thought how wonderful it was that she had never met before. He and she have completely different life trajectories, but she is so simple. He didn't dare to tell her, he could only maintain the purity that belonged to her. It may be dull, it may be uneventful, but at least there is still a blue sky. In the end, she still couldn't forget it, she still liked it, and she still cared about it.