A Beijing resident gazes at the smog.
In Beijing PM2.5 levels have stayed off the charts for 4 days, reaching over 900mg/m3 in parts of the capital. The city was put under an orange alert, which has imposed temporary restrictions on construction and industry and authorities have advised residents to stay indoors. 

一位北京市民凝视迷雾。

北京的PM2.5已经连续4天爆表，部分城区空气污染指数高达900μg/m3。城市发布橙色预警，强制暂时性关停建筑施工与工业生产活动，政府建议市民待在室内。