Photo taken on Nov 8, 2015 shows smog-shrouded downtown Shenyang, Northeast China's Liaoning province. Serious air pollution shrouded 14 cities in Liaoning province on Sunday, with provincial capital Shenyang witnessing a peak reading of the concentration of PM2.5 - airborne particles measuring less than 2.5 microns in diameter - of 1,017 micrograms per cubic meter.[Photo/Ecns.cn]