You can't. Zhibo Education is a training institution focusing on the improvement of adult education. The course is carried out according to a certain teaching plan and curriculum setting, and students need to participate in the combination of face-to-face courses and online courses to comprehensively and systematically improve their academic ability and quality. Buying only online courses does not conform to the school-running philosophy and teaching methods of Zhibo Education, so Zhibo Education cannot just buy online courses.