Assignment Enabling to finish homework at any time and anywhere, breaking the boundary of time and space and making learning more leisurely. Exam Supporting all types of questions on the cloud platform, providing more convenient answering, more direct marking, and easier reviewing. Lesson Providing a systematic online learning program, which can connect perfectly with Tang smart teaching system. Interaction providing built-in capabilities that allow the user to send short messages and ask and answer questions, making it easier for teachers and students to interact and solve learning difficulties.