Can length of military service only transfer to social security with a discharge certificate?

No, I still need to prepare my army and discharge certificate.

Go to the personnel department of the work unit. The personnel department will take the file to the labor bureau for appraisal, and it is necessary to transfer the endowment insurance to the local social security department for direct connection.

Provide personal files and military files when going to the local pension insurance. The social security bureau will mark the account according to the notice of enlistment and other materials.