The photo of 54-year-old Chai Shufen swimming in an almost frozen lake in Beiling Park in Shenyang city, the capital of northeast China's Liaoning province. [Photo/Agencies]

Chai Shufen, 54, lives in Shenyang city, the capital of northeast China's Liaoning province. The award-winning photo—featuring Chai dressed in a red swimsuit, swimming backstroke in an almost frozen lake—spread across social media and was included in the Reuters 2015 collection of best aerial photos.

Chai almost died in a traffic accident four years ago. After discovering that swimming was the best sport to support her recovery, she made up her mind to keep healthy by continuing to swim. Chai used to be afraid of water, but after only one month of swimming lessons, she learned the skill and became obsessed with winter swimming.