Officers in the army don't just use light rain to get good grades. Officers in the army are not required to learn in small languages, and other software can be used. Xiaoyu Youxue is an APP that focuses on online education and creates a quality learning platform for students at all stages of primary school, junior high school and senior high school. It has the traditional functions of searching questions, brushing questions, taking exams and answering questions. In addition, there are special classes, extended discussion of test questions and so on.