(201229) -- BEIJING, Dec. 29, 2020 (Xinhua) -- A man walks with his hands over ears on a street in Chaoyang District, Beijing, capital of China, Dec. 29, 2020. China's meteorological authority on Tuesday renewed an orange alert, the second highest in a four-tier warning system, for a cold wave as a strong cold front has been sweeping across most parts of central and east China from Monday. (Xinhua/Ju Huanzong)
