What is the cause of the rainstorm in Guizhou?

According to the inquiry, Guizhou is located in Yunnan-Guizhou Plateau, with rugged terrain and changeable climate. In winter, after a long journey, the cold air in the north has been greatly weakened when it reaches Guizhou, and the airflow moves slowly during the rising process. When it came into contact with the warm air that once stayed in Guizhou, the two sides were evenly matched and deadlocked for a long time, which led to rainy weather.