A pedestrian walks in street of Seoul, South Korea, Dec. 28, 2018. A cold wave hit the country on Friday, dipping Seoul's temperature to minus 19.3 degrees Celsius. (Xinhua/Wang Jingqiang)
People enjoy hot food at a stall in Seoul, South Korea, Dec. 28, 2018. A cold wave hit the country on Friday, dipping Seoul's temperature to minus 19.3 degrees Celsius. (Xinhua/Wang Jingqiang)
A man makes a phonecall at a bus station in Seoul, South Korea, Dec. 28, 2018. A cold wave hit the country on Friday, dipping Seoul's temperature to minus 19.3 degrees Celsius. (Xinhua/Wang Jingqiang)
A customer buys warm paste at a store in Seoul, South Korea, Dec. 28, 2018. A cold wave hit the country on Friday, dipping Seoul's temperature to minus 19.3 degrees Celsius. (Xinhua/Wang Jingqiang)