Why are sandstorms prone to occur in cold front weather? There is a cold front on the left and a warm front on the right of the trough. Why? I'm in a hurry. Help me.

This problem is mainly aimed at China's region (Northern Hemisphere). Strong cold air strikes from the north (northwest), and the formed cold front travels faster. When passing through arid and semi-arid areas in northwest China, it is easy to cause large-scale dust storms and form sandstorm weather.

The second question is not rigorous, because in a low-pressure tank, the collection of airflow is the same, and there is no so-called left and right. It should be said that in frontal cyclones in the northern hemisphere (generally in mid-latitude areas), the cold front generally appears on the left and the warm front generally appears on the right. It is mainly caused by the rotating direction of cyclone airflow in the northern hemisphere. On the left side, the cold air with relatively high latitude moves to the area with relatively low latitude, forming a cold front, while on the right side, it is the opposite.