Yes, it is allowed if you can't return to school normally due to objective factors. Tencent Conference is an online conference software, which supports multiple people to participate online at the same time, and can perform screen sharing, virtual background and other functions. It can realize the courseware and screen projection needed for network classroom, so it can be used for network classroom. Tencent congress line class is recognized by the education department, and the state allows students to attend classes because of objective factors, such as typhoons and epidemics.