T 1 means to be close to or have a world-class journal. The classification of journals in colleges and universities is slightly different, such as SCI, SCI, A& etc. HCI journals, EI-included papers and China scientific and technological papers collection catalogue. According to the influence of scientific and technological papers, our academic journals are divided into six categories: T 1, T2, T3, T4, T5 and T6.

Periodical classification

It can be divided into informal journal and formal journal. An informal periodical refers to a periodical that is approved by the administrative department to receive the "internal newspaper approval" as an intra-industry communication (generally limited to intra-industry communication and not publicly issued), but it is also a legal periodical. Generally speaking, formal journals have gone through the process of informal journals.

Official periodicals shall be examined and approved by the Press and Publication Administration and the State Science and Technology Commission within the agreed number and incorporated into the "unified domestic serial number". The application for running a journal is relatively strict, which requires a certain publishing strength. Official periodicals have an independent publishing policy.