China is trying to curb its smog problem before the world visits
The Atlantic, November 2, 2014
http://www.theatlantic.com/international/archive/2014/11/chinas-vain-attempts-to-halt-air-pollution/382263/
Related:
明年起北京将禁止现场搅拌砂浆 年减少粉尘排放7千吨 (Next year, Beijing to ban mixing mortar on site to reduce particulate emissions by 7,000 tons)
China National Radio, November 3, 2014
http://china.cnr.cn/yaowen/201411/t20141103_516712166.shtml