"If we..." It's just that there is no if in youth. If Xiao Tianyi had not met Li Yingse, if Qi Ye had not left Qin Sheng, if Qin Sheng had not rejected Xiao Tianyi... If this period of youth could be repeated, would everything be different? Qin Sheng has her dignity, Xiao Tianyi has his persistence, Qi Ye has his regrets, Zhang Yanfeng has his helplessness, Qin Xinran has her sadness... We each suffered our own suffering and parted ways. "If youth..." Unfortunately, there is no if.