At the age of twelve, Gu Zhizhi was sitting in the classroom, and he was within arm's reach; at the age of fifteen, Gu Zhizhi was sitting in the classroom, and he was in the classroom a hundred miles away; at the age of eighteen, Gu Zhizhi was sitting in the classroom, and he was on the playground thousands of miles away; at the age of twenty-six, Gu Zhizhi was sitting in the auditorium, and he was kissing his bride on the stage; the love in youth is slowly passing away, the love is too shallow, but everyone is happy.