Pupils' comprehension, graphic transformation, rotation, symmetry and translation are all excellent. . . These are all university contents. You hand in a small board, put some paper cuts on it, attract the paper cuts with magnets, and then make a triangular frame and a quadrangular frame. You can make many graphics, and you can rotate them at will. Don't be hypocritical in doing these things. Teaching students well is the key. At first glance, leaders know that works that are too gaudy will definitely not be used at ordinary times. Instead, I feel hypocritical and I am dealing with competition.