![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)](http://www.ecns.cn/hd/2018/12/29/75dbb18a8acb4556a6d2c065adffd080.jpg)
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)](http://www.ecns.cn/hd/2018/12/29/1c4c56ed18fd4a6aa307f84dae484a42.jpg)
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)](http://www.ecns.cn/hd/2018/12/29/3176b49a83b344a5aa4a75cfa58a4b6e.jpg)
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)](http://www.ecns.cn/hd/2018/12/29/620d6f7661114c0f9934da1470120712.jpg)
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)