He is 22-year-old Fang Tingwan, and he is 17-year-old Qiao An.
They met as teachers and students, but they got closer to each other uncontrollably.
High school, college, work, and the important stages in Qiao An's life all have a profound imprint on Fang Tingwan.
Good night, Fang Ting, good night, Qiao An. Among the billions of people in the world, I just want to say good night to you every day.