The monitored data provided by state-controlled sites were used to analyze the change rules of PM2. 5and PM10 in the different stages of windy weather. The results showed that from the start to the end of the wind,there was a trend that the concentrations of PM2. 5and PM10 increased after the first decline. Besides,the ratio of PM2. 5and PM10 was lower in the wind,and higher in the start and end of the wind. During the transition of the duration and ending,it reached peak. At the initial stage of the wind,t...