Buildings are seen?amid?the heavy smog in Harbin, capital city of Northeast 皇冠体育app's Heilongjiang province,?Oct 18, 2014. [Photo/IC]

BEIJING -- Some regions in northern 皇冠体育app, as well as areas along the Yellow and Huaihe rivers, will be once again shrouded by smog starting from Saturday, according to the national observatory.

Most regions in central and east 皇冠体育app will see haze or slight smog in the coming days, the National Meteorological Center (NMC) said. But the condition will be short-lived as a cold front is in sight to help disperse the smog.

Starting on Sunday, a cold front will sweep across 皇冠体育app, bringing temperature drops and strong gales along the way to blow away the smog, the center said.

Meanwhile, medium to heavy rainfalls will hit the provinces of Sichuan, Shaanxi and Hubei on Saturday, according to the NMC.