Shanghai was hit with floating sand and dust on Wednesday, prompting sanitation authorities to launch emergency measures to reduce the dust. Forecasters expect light rain will help clear the air on Thursday. Due to the impact of backflow at sea, the air quality in Shanghai during the day was between severe to moderate pollution. The AQI(Air Quality Index ) declined slowly later. On Tuesday afternoon, in Yangzhou, Jiangsu Province, due to the invasion of strong winds, the visibility decreased. The pedestrians put on masks on street. At 10 o'clock on Wednesday, Yangzhou continued to issue a yellow haze warning. Due to the impact of northern dust transmission, it is expected that the floating dust and haze weather in Yangzhou will continue in the next 24 hours, but the intensity will weaken.