Is the weather system that causes sandstorms cyclone or anticyclone? 05 Beijing Volume and 10 National Volume give opposite answers? Why?

Can you type the original question? First of all, the most fundamental cause of sandstorm is the front, and both cyclones and anticyclones will form the front. At this time, specific problems need to be analyzed. The title of 2005 is the sandstorm in North China in April, which is caused by the cold front formed by Mongolia-Siberia high pressure. Because of the anticyclone formed by high pressure, it is an anticyclone. Never seen the problem of 10. You can ask if you need it.