Xiang Yu
After Xiang Liang died, Fan Zeng continued serving his nephew, Xiang Yu, as an advisor. Xiang Yu respectfully addressed Fan Zeng as his "Second Father" (亞父; "Yafu"). Since then, Fan Zeng had been planning and formulating strategies for Xiang Yu to overcome his rivals. In 206 BC, Fan Zeng followed Xiang Yu as their army entered Guanzhong (heartland of the Qin dynasty), where Fan Zeng noticed that Liu Bang would become a future threat to Xiang Yu. Fan Zeng constantly urged Xiang Yu to kill Liu Bang then, but Xiang did not heed his advice.