Play all audios:
Nine cities, including Jinan in the province of Shangdong were advised to issue the lower-status orange alert, Liu Bingjing, the ministry's head of air quality management, told the
paper. The notification will be the third joint warning by city governments this month, Liu added. Regular episodes of smog blanketing northern China this year stem from a combination of
local emissions, unfavourable weather and pollutants wafted in from elsewhere, Bai Qiuyong, head of China's Environmental Monitoring Center, told the paper. Environmental authorities in
Hebei province, which borders capital city Beijing, asked for a level one emergency response from major cities in the region to begin from Friday, according to a post on its official Weibo
account late on Thursday. The order requires the large number of heavy polluting industries in these cities, including in Tangshan, China's steel capital, to cut back or halt production
until Wednesday. Red alerts are issued in Beijing when the air quality index, a measure of pollutants, is forecast to break 200 for more than four days in succession, surpass 300 for more
than two days or overshoot 500 for at least 24 hours. At each level, the colour-graded warning system prescribes advisories for schools, hospitals and businesses, as well as possible curbs
on traffic and construction. Thresholds for the issue of alerts vary among cities, as do the cautionary measures urged on local residents and businesses at each stage. Residents of smaller
cities near Beijing have previously complained that local government bodies failed to issue warnings when pollution was just as severe as in the capital.