If you asked which human invention was the most important (or the most inhumane), don't hesitate. There's only one answer: the high school entrance exam. Shen Su, a middle school graduate, was so nervous during the exam that he performed terribly and chose to end his life in despair.
But can someone tell me why I still have to suffer through exams after I'm dead?! Shen Su's inner monologue: Hey, top student, are you here to take the exam too? Take your little underclassman with you, will you?