Jiang shisheng and the Qiao family had nothing to do with the collapse of the shelf.
Every Sunday, the laboratory would undergo a large-scale cleaning and maintenance. Yu Gangan's accident happened on Tuesday, so logically speaking, it should have just been re-examined, so the screws on the metal frame shouldn't have all come loose.
The place was relatively remote and was the blind spot of the surveillance cameras. It was impossible to find out who did it, but other surveillance cameras could see how long one had been in the area.
He found that other than the equipment inspectors and cleaners, no other staff members had been there for long.
At that time, he was sure that it was second uncle's doing and didn't let anyone continue to investigate.
