1) Regular Registration: Submit a full paper to publish and present at the conference. 2) Student author: Provide a valid certificate from their departments (only for the first author). 3) Extra papers: One author can only publish no more than 2 papers. 4) Additional Page: If the paper exceeds 5 pages, extra pages should be paid at 50USD/page. 5) Presenter: Only submit abstract to present at the conference. 6) Listeners: Only attend the conference, without publication. 7) If you are interested in attending ICRICAI 2021 with no publication, please complete the registration on the Online Registration System.