Chen Chunming was killed by one student whose girlfriend had some sex relationship with him, but Tu Xuxin was killed by himself, or we can say by his sense of lose.

• 程春明是被一个学生杀死的，他跟这个学生的女朋友有性关系，但是涂序新是自杀的，或者我们可以说他是被失落感杀死的。