The Xin'an River in Jiande was foggy in summer, especially in the early morning and evening. We came in the afternoon. The river was very clean. We saw the bridge in the distance, but after a while, there was a big fog suddenly. The bridge in the distance was invisible. The bridge head stretching into the river was shrouded in a fog, and the water flow of Xin'an River was very rapid, visible to the naked eye. The water here is 17 degrees all year round, there will be winter swimming every year, yes you are not wrong, because the temperature of the water here is very low, called winter swimming is not an exaggeration, if you don't believe it, then you please try it!