I am a doctor

"Sir, what's wrong with this old gentleman?"
When Harbinger Campbe and Fang Tingting walked over there, a staff member from a nearby supermarket had also arrived. A man in security uniform walked quickly up to the young man and asked with a look of concern on his face.
The young man ignored the man in security uniform.
At this time, the young man seemed to have calmed down after the panic just now. He took out a mobile phone, flipped through the phone numbers on it, and dialed a number.
"I'm...