Changyang Science and Technology Vocational School is located in the southern suburbs of Changyang City. It's neither Changyang, nor science and technology, not even vocational, and it doesn't resemble a school.
However, the campus management is very strict. You have to use facial recognition to enter and exit, and you need to clock in for classes. The pressure isn't as intense as high school, and the density of the school is slightly lower.
Cao Chujun intentionally brought two female officers to the school for interviews, visiting the deceased Zhang Xianyao's dormitory, classroom, classmates, friends, and teachers, walking through everything.