In 206 BC, Xiang Yu's army arrived at Hangu Pass (eastern gateway to Guanzhong) and Liu ordered his men to prevent Xiang's forces from entering Guanzhong. Xiang Yu was furious when he learnt that Liu Bang had beat him in the race to Guanzhong, and he wanted to kill Liu after being instigated by Fan Zeng and a defector from Liu's side, Cao Wushang. Xiang Yu's uncle, Xiang Bo, was an old friend of Zhang Liang and he secretly warned Zhang that Xiang Yu was planning to attack Liu Bang. Liu Bang was shocked and fearful when he heard that, as his forces were too weak to counter Xiang Yu. Zhang Liang advised Liu Bang to attend the Feast at Hong Gate hosted by Xiang Yu, to put Xiang off guard and dismiss Xiang's suspicions that Liu was intending to oppose him. With help from Xiang Bo, Liu Bang managed to survive the dangerous banquet and Xiang Yu dismissed the idea of killing Liu. However, Fan Zeng was dissatisfied and he asked Xiang Yu's cousin Xiang Zhuang to pretend to perform a sword dance and use the opportunity to kill Liu Bang. Xiang Bo intervened again and saved Liu Bang's life.