The first cold wave in 2021 hit Beijing on Wednesday.
The highest temperature dropped to minus 17℃, with a wind level of 8 to 9.
Some winter swimming fans smashed the ice on a frozen lake in Shichahai, a historic spot in downtown Beijing.
An elderly winter swimming fan, nearly 70, has maintained this habit for about 20 years. He once challenged winter swimming at minus 25℃.