The teacher told a story: Four Tang Priests and apprentices came to the Lotus Cave in Shishan, and the Monkey King was tied by King Jinjiao with a golden rope. After the Monkey King slipped out of the cave by magic, he challenged the monster again. The two demons demanded his name. The Monkey King said, "I am the monkey brother you arrested." Later, the Monkey King changed again, claiming to be the grandson of the Monkey King. (Courseware demonstration)

Teacher: Think about it. How many brothers will the Monkey King have if he keeps changing? What are their names? A: Sun Zhe, Sun Xing and Sun Zhe (courseware presentation).

The teacher concluded: You see, you can change so many names with the word "Sun Walker". The secret is to apply the knowledge of arrangement in mathematics. In this lesson, we will explore a simple arrangement together. (blackboard writing topic)

The Monkey King is an optimistic, courageous and courageous person. This is most fully manifested in the struggle to cut off demons and ghosts on the way to learn from the scriptures. On the way to learn from the scriptures, even though he experienced more difficulties and met more monsters, the Monkey King was not afraid to shrink back. He always keeps positive and optimistic, and faces everything with high spirits. Even if he failed, he never gave up and kept going. This is not only due to his superb skills, but also to his firm belief in learning from the scriptures. With the support of both sides, he can laugh at the wind and rain.