You can't take a screenshot in the middle. Because the screen capture will stop running the program when switching, it can't enter normally, so the screen capture can't be taken in the middle of the situation and policy exam. According to the query related information, Erya is based on micro-service architecture. Users can complete library book borrowing and querying, electronic resource searching and downloading, library information browsing, school course study, group discussion, school address book viewing, etc. On their mobile phones, they provide users with convenient and fast mobile learning services. This software combines the traditional education mode of internet plus, and derives a brand-new education mode, covering a large number of learning resources such as books, periodicals, newspapers, etc. There are many brand-new courses to access, which can provide readers with a one-stop learning and working environment.