1 / 5   The 19th International Winter Swimming Game opened in Harbin City, northeast China’s Heilongjiang Province on Saturday. /VCG Photo

2 / 5   The two-day event is attracting hundreds of swimmers from countries including China, Russia, Belarus and the United States. /VCG Photo

3 / 5   Swimmers have to compete in an extremely cold pool in the Songhua River. Temperatures in the city are ranging from -21 to -11°C. /VCG Photo

4 / 5   The swimming pool is 25m long, 15m wide and 4m deep. Participants were divided into 16 groups according to gender and age. /VCG Photo

5 / 5   The Winter Swimming Game is an important section of the Harbin International Ice and Snow Festival, which also kicked off on the same day. /VCG Photo