What would happen if cold and warm fronts met? (Interpretation of geography knowledge in senior one)

The interface between cold and warm air masses is called front. The front is also called the front area, and its horizontal range can reach hundreds of kilometers. Because of the high density of cold air and low density of warm air, when cold and warm air masses meet, usually the cold air mass is below the front and the warm air mass is above the front. Because there are obvious differences in temperature, humidity, air pressure and wind force on both sides of the front, there are often clouds, rain and strong winds near the front.

The front is generally divided into cold and warm fronts. Cold air refers to the front where the cold air mass actively moves to the warm air mass. The front edge of the cold air mass is inserted under the warm air mass, which makes the warm air mass forced to rise. The warm air mass cools in the process of lifting, and water vapor is easy to condense into clouds and rain. Therefore, when a cold front crosses the border, it often appears cloudy, rainy, windy, cooling and other weather phenomena. After the cold front crossed the border, the cold air mass replaced the original warm air mass, so the air pressure increased, the temperature and humidity plummeted, and the weather turned fine. Warm front refers to the front where the warm air mass actively moves to the cold air mass. The warm air mass climbs slowly along the cold air mass, in which water vapor condenses to produce clouds and rain. Warm front precipitation mostly occurs before the front, mostly continuous precipitation. After the warm front crossed the border, the warm air mass occupied the position of the original cold air mass, so the temperature rose, the air pressure dropped and the weather turned fine.

Most precipitation and some meteorological disasters in China are related to the front, and the front that affects the weather in China is mainly the cold front. The summer rainstorm in northern China is mostly frontal rain formed by cold front. The cold wave that broke out in winter in China was formed when the cold front went south.

I copied it from the textbook.