Also happened during the 2016 G20 summit in Hangzhou. There's a Chinese phrase for it, "G20 blue" or "G20蓝". (https://blogs.wsj.com/chinarealtime/2016/08/26/chi

Also happened during the 2016 G20 summit in Hangzhou. There's a Chinese phrase for it, "G20 blue" or "G20蓝". (https://blogs.wsj.com/chinarealtime/2016/08/26/china-basks-in-g-20-blue-as-factories-ordered-to-shut/ https://blogs.wsj.com/chinarealtime/2016/08/26/china-basks-i...) That said, this doesn't seem to be a localized shutdown, of the kind we saw during the Olympics or G20 summit. I know of a number of Chinese factories in industries ranging from finished wood products to consumer electronics that have been shutdown nationwide for "environmental audits".