The passion has passed, and the dullness left behind makes people can't help but recall those short and sweet years. "We were together every day at that time. We were so happy that we didn't need distance. We were so greedy that the world wanted to pay attention. But we were too young. Happiness and sadness were all like acting. The moment we touched it, it was earth-shattering. Looking at you today, where did you go yesterday? That summer I hid with you, in this vast Ningxia. The quiet sea, until later, we were still there, full of expectations for the world. This winter, you are no longer here, and my heart is empty. I am very happy to meet you, and I finally understand that it is wonderful to remember you. I still remember working together, and those things that were agreed upon. Now I regard the past as a kind of learning, although it is not easy." The song "Silent Sea" that summer also sang this story