[Why] On the eve of Qin's collapse, Liu Bang entered Guanzhong first and accepted the surrender of King Ziying of Qin, infuriating Xiang Yu. Xiang Yu camped four hundred thousand troops at Hongmen, intending to annihilate Liu Bang's faction in one stroke. [What] Persuaded by Zhang Liang, Liu Bang personally attended the banquet to apologize. Fan Zeng repeatedly signaled Xiang Zhuang to dance the sword and strike Liu Bang, while Xiang Bo rose to dance alongside as his shield. Fan Kuai burst into the tent berating Xiang Yu, and Liu Bang finally escaped under pretext of a latrine visit. [Who] Liu Bang was a political survivor expert in reading the moment, willing to bend to rise. Xiang Yu was an indecisive Western Chu Hegemon lacking long political vision, while his strategist Fan Zeng left in fury after his plan was rejected. [How] The Hongmen Banquet marked the political watershed of the Chu-Han contest, costing Xiang Yu the best chance to eliminate Liu Bang. It became China's most famous political wager-banquet, deeply shaping the trajectory of the realm thereafter.
Why
The historic event of Hongmen Banquet represents a key developmental peak of the Huaxia dynastic system. The epic political duel-banquet that decided the trajectory of Chu and Han. By establishing this moral or administrative benchmark, it continues to shape the structural and philosophical fabric of ancient Chinese statecraft.