C111 The Control System of the Hospital

"Dr. Liu, your work is absolutely astonishing. I was looking right at the corner and didn't even spot that lock hole."

"I intentionally designed that lock hole, along with another special feature."

Dr. Liu led Chu Yue to a different spot, grabbed a wooden ladder, and climbed up. He took out his key, found a small hole on the roof, turned the key, and to their surprise