What do you mean, the wind and the flute are so cold that they catch cold easily?

"The wind is rustling and the water is cold, and the strong man is gone forever!" This is from Historical Records Biography of Assassins: Prince Taizi Dan sent Jing Ke to the Yishui River to stab the king of Qin. Prince Taizi Dan, a guest, and several friends of Jing Ke all wore white hats and sent them together. Directly sent to Yishui near Yixian County, Hebei Province, and sent away with tears; When Gao Jianli hit the building, Jing Ke sang to the music: "The wind is rustling and the water is cold, and the strong man is gone forever!" The solemn and stirring singing aroused the great sorrow and generosity of the people who saw him off. Jing Ke was singing and left without looking back. It left a tragic poem for future generations, "The wind is rustling and the water is cold, and the strong man is gone forever." The Warring States Policy also records that Jing Ke stabbed the king of Qin.