1 is not online or published. If you only have the letter of admission, you can take a copy of your paper and the letter of admission, plus the impact factors of the journal and the certificate of JCR branch.

Schools generally require the signature of the tutor on the admission notice, and then the paper can be downloaded from your submission system to a watermarked pdf and printed out. Proofreading of this magazine can be found in the library.

If you have a doi number on the Internet but haven't read the publication, that is, the online proof that you can go to the library to open a paper, which is similar to the search proof, will include periodical information and paper information.