Beijing uses a five-grade classification of air quality on the basis of pollution indices, with Grade I being the best and Grade V the worst. Days with Grade I and II air quality are regarded as "blue sky" days.
When we are on our third straight week of toxic air, this story put out by Xinhua News Agency today just made me laugh. What China classifies as "Blue Sky" days (Grade I and II) would be classified as 'SO DANGEROUS YOU SHOULDN'T EVEN THINK OF GOING OUTSIDE" in any other country.
Such is life in "The Jing," especially in August.