[90S + Northwest Small Town + Youth Group Portraits] It was a northwest small town in the late 1990s. The days are slow, bicycle bells are jingling, and an old mobile phone can become the focus of the class. The boys discussed privately which class had good-looking girls, and the girls passed around a well-thumbed copy of "Flower Season·Rainy Season". The teachers each have their own tempers - "Southern Boxing" Geng Yanhu is ruthless, and "Northern Leg" Pang Yingjuan hides her sword in her smile. They think three years of high school is a long time. Grow up enough to slowly quarrel, grow up slowly, and slowly like someone. He is so long that he can hide unspeakable words in the submissions of the school newspaper, in the umbrellas that are handed to him, and in the back seat of the bicycle on the way to school. They don't know that some people pass through your life just to leave early. What happened next, no one expected. Some never came back. Some people cut off their long hair and walked into the military camp. Someone wrote youth into a thin book and placed it in front of her tombstone. Only the wind by the river is still blowing. The wind passed by the river, blew past the seventeen-year-olds, blew past their smiles, their tears, and their thoughts that they had no time to express, and never looked back.