In 2022, all universities in Shanghai will have online classes. According to relevant public information, the notice issued by education bureau of shanghai on June 7, 2022 (65438) shows that all offline teaching in Shanghai University has been converted into online courses, which will last until the end of 2022. Online courses are online courses that are learned by electronic devices through the Internet. Different from offline classroom teaching, online classroom has the advantages of various ways, flexibility and convenience, and more and more students and parents are beginning to use it.