Signal the weather system.

Test and analysis: the horizontal airflow diverges from the center in all directions, and it is judged that the air pressure center is high pressure. If the high pressure controls most parts of China, it is judged as the influence of the Asian high pressure in winter, so most parts of China are cold and dry. In summer, the subtropical high controls the southern part of China, but not most of it. Meiyu is the weather affected by quasi-static front; Typhoon is a weather example of tropical cyclone formation.

Comments: This question is more difficult. Students should not only grasp the meaning of the problem, but also grasp the weather examples that affect the formation of common weather systems in China.