Central meteorological station of China has upgraded the orange alert smog in the Northern part of the country.
Smog has been shrouded in Henan, Shanxi, Shaanxi, Jilin, Heilongjiang and Liaoning, as well as the region the Beijing-Tianjin-Hebei. Visibility in some places does not exceed 200 meters. Because of the smog was delayed and cancelled many flights in Beijing international airport Beijing.
