Into the residential property security?

You must be the agent. The security guard did the right thing. He did his duty. If you live in your own community, you don't want outsiders to come in and out casually. It's no use persuading the security guard, because the security guard listens to the property customer service. You can go to the customer service department, explain the reason for entering the community, and then tell the specific room number. The customer service staff will contact the owner and let you in with the consent of the owner. You must register before entering. I hope you can understand the practice of property management. After all, owners want their homes to be safe enough.