I applied for a patent on the China Application Technology Network. Someone called me to discuss cooperation and asked me if I had a certificate. I said no and the person hung up the phone.

First of all, you cannot apply for a patent on the China Applied Technology Network, because patents are uniformly accepted and authorized by the State Intellectual Property Office. In other words, you can only apply for a patent with the State Intellectual Property Office, or entrust The agency helps you apply. You have to be wary when they call you to talk about cooperation. Most of them are scammers. Usually they ask you to pay for appraisals, searches, etc. They ask you to pay money step by step. Be careful about this.