Nicknamed “Iron Girl”, China’s Xin Xin is an elite open water swimmer who made history in 2016 when she became the first Chinese swimmer to win a FINA Marathon Swimming World Cup race. She made further history at World Aquatics Championships in Gwangju, South Korea in 2019. Not only did she win her first gold medal (in the 10km open water marathon), she again became the first Chinese swimmer to win a World Championship open water event. She quali...