From Pan Lang's (
潘阆, Northern Song) 《
酒泉子·
长忆观潮》, describing the Qiantang tide-surfers of Hangzhou:
弄潮儿向涛头立,手把红旗旗不湿. (The tide-surfer stands atop the breakers, gripping the red flag, and the flag stays dry.) A famous image of fearless skill amid natural fury.