Xi'an authorities are urging people to wear face masks after park dust engulfed a downtown neighborhood Wednesday afternoon, prompting public alarm over the unexpectedly large particulate matter expulsion from the construction site near Xingqing Lake over the past two weeks.
user
西安市当局敦促市民佩戴口罩，因周三下午公园尘土笼罩市区一街区，引发公众对过去两周兴庆湖附近建筑工地意外大量排放颗粒物的担忧。
assistant