《史记·项羽本纪》中的“鸿门宴”史事 ,记述项羽闻知刘邦先入咸阳 ,尽占珍宝 ,封宫闭室 ,欲王天下 ,乃果断决定 ,趁刘邦立足未稳 ,“击破沛公军”。由于项伯徇情 ,私下知会刘营张良 ,致使项羽错失良机 ,终违初衷 ,刘邦得以死里逃生。以今之逻辑细加揆度思考 ,不觉疑窦丛生— “Shi Ji Xiang Yu Benji” in the “Banquet Banquet” historical events, Xiang Yu Wen Wen Liu Wen heard first heard into Xianyang, as a treasure, sealed the closet room, for the world, is decisive decision, while Liu Bang set foot in the foot, “break Pei army” . As a result of Xiang Bohu situation, privately informed Liu Ying Zhang Liang, resulting in Xiang Yu missed the opportunity, ultimately, Liu Bang was able to escape. Today's logic is more refined thinking, do not feel doubtful -