What you want to ask is the official mobile app corresponding to the National Open University Learning Network? Guo Kai Online "application. The official mobile application app of the National Open University Learning Network is "National Open University Learning Platform", also known as "National Open University Mobile Learning Client". The app can be downloaded for free in major app stores and supports Android and iOS systems. Through this App, students can learn online anytime, anywhere, including online lectures, online answering questions, online homework and other functions. In addition, the App also provides functions such as learning progress inquiry, grade inquiry and course evaluation. To facilitate students' learning management and self-evaluation.