China's national observatory Saturday issued a blue alert, the lowest in the country's four-tier warning system, for a cold wave that is to grip most of the country, bringing freezing temperatures and strong winds.

The National Meteorological Center warned that another cold wave is expected to affect central and eastern parts of the country from December 18 to 20, dragging temperatures down by up to eight degrees Celsius, and in some parts of China, temperatures could drop to historical lows. Join live to learn the related cold wave supply measures, traffic security and snow clearing around the country.