He is your teacher, and the other is your teacher. Your test paper contains his red pen and ink. Your textbook, his dictated notes. The classroom once echoed with his passionate lectures. His unruly white chalk words were left on the blackboard. In the endless learning, his figure has stayed in your heart for a long time and has never left. Especially the two young people, one handsome and one profound teacher, are even more unforgettable...