The quasi-static front causes the climate in Kunming to be like spring all the year round. Can you tell me specifically how the quasi-static front is formed?

The quasi-static front in Kunming is formed by topography. When the cold air from the south reaches the eastern part of Yunnan-Guizhou Plateau, its influence is greatly weakened due to the long distance. Therefore, when it reached the eastern part of Yunnan-Guizhou Plateau (near Kunming), it gradually slowed down and finally stopped, forming a quasi-static front in Kunming due to the undulating terrain of Yunnan-Guizhou Plateau.