A periodical is a magazine that publishes papers. Periodicals are places where academic papers are published. Periodical, published regularly. Such as weekly, monthly, bimonthly, monthly, quarterly, biannual, annual, etc. Publications shall be published by periodical publishing units established according to law. Periodical publishing units must be approved by the General Administration of Press and Publication, hold the domestic unified serial publication number, and obtain the Periodical Publishing License.