Haha, the original poster, the patent rights belong to you, can others have the final say whether it is fake or not? In China, local patent management departments (local intellectual property offices) and the administrative department for patent management under the State Council (State Intellectual Property Office) have the final say, so it is the infringer’s turn to speak? Since the poster has the certificate, he can confidently show it to the other party, but be careful of the other party's invalid revocation of your utility model.