BEIJING -- Capital Beijing and several provinces in China will be affected by thick, dense sandstorms that will severely affect visibility, Chinese weather authorities said on Wednesday. The Central Meteorological Observatory issued yellow warning signals from Wednesday to early morning Thursday for Shaanxi, Shanxi, Hebei, Heilongjiang, Jilin, Liaoning, Shandong, Henan, Jiangsu, Anhui and Hubei provinces. Many areas will have low visibility, weather forecasters said, cautioning drivers on speed. Sandstorms will gradually move south and then weaken, forecasters added. China has a four-tier, color-coded weather-warning system, with red representing the most...Keep on reading: Thick sandstorms shroud Beijing and several provinces in China