Fan Li
King Goujian of Yue was once imprisoned by King Fuchai of Wu after a defeat in war, and Yue later became a tributary state to Wu. Secretly planning his revenge, Goujian's minister Wen Zhong suggested training beautiful women and offering them to Fuchai as a tribute (knowing Fuchai could not resist beautiful women). His other minister, Fan Li, found Xi Shi and Zheng Dan, and gave them to Fuchai in 490 BC.