Teacher Liu is a teacher at Xizhao Middle School, likely in charge of dormitory supervision. He is the first teacher to see the aftermath of Xi Yang's beating. When Li Chuan reports the blood, Teacher Liu goes to the dormitory, sees Xi Yang's pale face, and questions the other students. He accepts their flimsy excuse that Xi Yang fell, showing negligence. He later appears concerned but fails to take immediate action. He represents the institutional failure to protect students.
