On July 28, the Xin’anjiang 2019 International Challenge of “Winter Swimming in Summer” was held in Xin’anjiang, Jiande City, with over 3,000 swimming fans from home and abroad. The Xin’anjiang River’s temperature is kept at 17℃all year around for its unique geographic location and natural environment. Swimming fans jumped into the river at a temperature of up to 36℃on the day.