I come from Jilin. I just got my internship certificate some time ago, went through all kinds of formalities, and ran by myself.
All the materials were handed in. Now I'm waiting for the certificate to share my experience with you.
What do you mean by going to Criminal Investigation Five? I don't know what this means. The internship lawyer's certificate is the material audited by the Judicial Bureau, and finally the certificate is issued by the Provincial Lawyers Association, which has nothing to do with public security. All provincial judicial departments have a list of materials that need to be prepared to apply for internship lawyers, and there is no criminal certificate that can be related to public security. Others include the certificate of file keeping issued by the unit where the file is located, the certificate of good conduct and so on. The requirements of each province may be different. You'd better find out what your Tianjin Judicial Bureau requires, and just follow the above preparations. After that, it will be very convenient to report the materials to the Justice Bureau. In addition, if your place is relatively large and standardized, you can leave the internship to the administrative staff, who should have done a lot; Or ask the young seniors in the institute, which will save a lot of trouble.
I hope I can help you.