When I was 12, I caught a film on TV. The film follows the lives of a group of elementary school students and their teacher. I was initially interested because the children were my age, and the teacher in the film was dedicated, like the teacher I was having then, Teacher Thor (that's her family name, yeah, but we all call her "Tu Lao Shi", which means Teacher Thor in Chinese). But I was slightly surprised when there were a few time skips in the film. The children suddenly became teenagers, and there was a class reunion with their teacher (that led to tragedy). They then became adults, and had another reunion, this time for a wedding. I remember that one of the main boys was in love with the bride. I didn't exactly finish the film, but a few of these scenes remained vivid until this very day (the teacher's fiancee sacrificing himself to save a drowning student during one of the class reunions, and also the aforementioned wedding). Perhaps the film was