During the Zhengde reign of Emperor Wu of the Ming Dynasty, rumors circulated in the world that the assassin Xi Honglei "came and went without a trace, as light as a swallow, with extraordinary skill in the first cut, in the second cut in the country and in the city, and ingenious calculation in the third cut", hence the name "Three Cuts of the Light Swallow". No one has ever seen "Three Cuts of Qing Yan", and even "Xi Hong Tears", whose name is the same as the legendary most beautiful woman in the Song Dynasty, is doubtful. There are no red tears in the world. Who are the "Three Cuts of Qingyan"?