Why did the police car escort to Hami?

Strong dusty weather. The reason why Hami escorts police cars is that there is often strong dusty weather in Hami, and the purpose is to protect people's lives. Hami is a prefecture-level city under the jurisdiction of Xinjiang Uygur Autonomous Region, located in the east of Xinjiang. It is the hub of Xinjiang to the inland. It has been the throat of the Silk Road since ancient times, and is known as the throat of the western regions, the Chinese treasury and the gateway to Xinjiang.