DeZhiwei classroom can't be used because of data packet corruption. Dezhiwei classroom is a learning assistant. During the download process, the data packet will be damaged, which will make it impossible to run. You can try to run it by downloading and reinstalling it. The course recording of primary and secondary schools in Dezhi Micro-classroom is a micro-course package made by teachers from junior and senior high schools hired by Dezhi Education, which mainly includes primary school course service, junior and senior high school synchronous course service and senior high school entrance examination course service.