Kang Xuans "Turning the Graph" makes the model move, and it is easy to learn graphics by turning the angle of view and interactive observation.Features︰1. Provide a variety of models in conjunction with the textbook legend.2. Flip the model arbitrarily and observe the model changes.3. Use the perspective menu to quickly go to a specific angle.4. Switch the transparent mode and view the model hidden structure.5. Colors are freely matched to enhance the observation.