The sixth floor of the psychiatric building housed the close-observation wards.
The ward Yan Feifan entered around 7 PM was even more unusual.
It was divided by blast-proof glass into an inner and outer room, connected by a blast-proof glass door with a keypad lock.
From the outer room, doctors could observe the patient in the inner room and communicate with them.
The inner room was well-equipped, with a bed, a table and chairs, and an open washroom with a toilet and a sink.
The inner room also had a tap that dispensed warm, potable water.
Standing in the outer room, Yan Feifan studied the patient inside, Yv Yang.
He had noticed it too.
Yv Yang, who was neatly dressed and well-groomed, was also furtively studying him.
Forty-four-year-old Yv Yang sat on a chair in the safest corner of the room, reading a book while stealing glances out of the corner of his eye.
For a patient suffering from paranoia, such behavior was completely normal.
