A cold spell sweeping north China will bring strong wind and drag down temperatures by up to 10 degrees Celsius in some areas, China\'s meteorological authorities said Sunday.The cold front will also bring snow and rainfall to the country\'s northeastern regions on Sunday, the National Meteorological Center (NMC) said.Temperatures are expected to further drop in northern and northeastern parts of the country, falling by six to 12 degrees Celsius in some areas, the NMC said.Strong northerly winds of level four to six will blow through most parts of North China and Yellow River-Huaihe River region, the NMC said.Agrometeorological experts have warned citizens in the affected regions to guard against sharp temperature drop and consequent frozen road surface.