The WeChat notification on the phone brought his thoughts back to nine years ago, when Zhao Xinran met Gao Xuyang for the first time, but neither of them knew at the time that they would have so many intersections in the future. Precisely during the best years of their lives in junior high school, high school and college, the two were constantly separated but still kept in touch, as if this also foreshadowed their ending. When we are young, we seem to be particularly determined about everything we love, whether it is things or people, only we can understand the sadness and sweetness in it. Zhao Xinran comforted herself again and again when she was lost. The sun will rise tomorrow as usual. I am greedy for warmth and will continue to travel far, just because my heart is sunny...