I knew the class he was in, but I didn't know his name. I remembered his appearance, but I didn't know that this appearance would be engraved in my heart again and again in the days to come, and finally became a pit, a very deep pit, where the seeds of the youth tree were planted, broke the soil, sprouted, and grew up, leaving the greenest and most heart-stirring patterns in my youth. There is a sentence in teacher Zhang Ailing's work "Half Life": Destiny is really a wonderful thing. Some people will never know each other in their lifetime. They are so close but they are like strangers, while some people are destined to be together and cannot hide... Maybe it is true. Two people who have been in the same school for so many years have never had any communication, but even so, they still can't hide...