Time flies, and when I return to City B, a lot has changed. Many of the old buildings have been demolished, and there is only one bridge where we stood when we waved goodbye. It seems like it has never changed, you. Likewise, perhaps, our youth has not changed. Fang Jin met Ji Guanchen when he was five years old. In his memory, he was cold to others, which frightened Fang Jin. After he was five years old, Ji Guanchen gradually faded out of Fang Jin's world. When we meet again after ten years, will he still remember him?