Little white cloud can drop out of school. According to the relevant information, if the user needs to withdraw from the course for personal reasons after purchasing the course of Baiguoyun, the fee can be refunded, but not in full, and the course fee and corresponding handling fee that the user has watched should be deducted. Baiguoyun Classroom app is a very professional learning resource software, which can provide users with all kinds of learning knowledge, including English, Chinese and mathematics.