If there is only one teaching and research achievement, it may not be sufficient. Even if you evaluate intermediate titles, you need several pieces.

Moreover, the content of the certificate and its relevance to job evaluation are another matter, and it is normal for the judges to think that the gold content is insufficient. Sure, I think I can give you some points.

If the judges have questions, they will ask relevant questions around the contents and processes involved in the certificate. If you have a defense, you must be prepared in advance.