Yang Ping discussed some experimental details with Manstein and then left the cell laboratory to go to Weber.
Weber's office door was open, but he was not there. Yang Ping asked a student nearby, who said Weber had gone to the animal room to administer treatments to the experimental animals.
Yang Ping then went to the animal room.
The animal room was not in the institute but housed in a temporary steel structure, a strictly controlled environment requiring protective gear, masks, and gloves to enter. Yang Ping changed in the changing room, equipped himself, and entered with an access card.
The animal room was very quiet, except for occasional animal sounds. Weber stood at a workstation holding a syringe, preparing to perform a tail vein injection on a rat.
Yang Ping did not disturb him and stood quietly watching from the side.
