In 494 BC, King Goujian of Yue suffered defeat at Kuaiji and was forced to enter Wu as a slave, enduring the ultimate humiliation of "tasting feces and asking about illnesses." After returning to his state, he slept on firewood at night, licked a bitter gall during the day, and vowed to wipe away the disgrace. Through ten years of gathering strength and ten years of teaching and discipline, he offered Xishi to disrupt the Wu palace and borrowed cooked seeds to cut off Wu's food supply. Taking advantage of Fuchai's northward expedition for hegemony, the Yue army launched a surprise attack on Gusu, ultimately becoming a generation's hegemon. However, the dragon-slaying youth finally became an evil dragon; after successful revenge, he forced Fan Li to flee and ordered Wen Zhong to die. This is not only a satisfying story of a comeback from a desperate counterattack, but also a bloody tragedy of power and human nature.