worried but without a plan. Zhang Song answered: "Liu Bei is of the same clan as you and he is an unstoppable rival of Cao Cao. He commands troops with talent. If we used him to conquer Zhang Lu, Zhang Lu would surely be defeated. With Zhang Lu vanquished, Yi province would be safe and even if Cao Cao were to come, he would be defeated." Some time passed and Zhang Song again pressed Liu Zhang. : Liu Zhang heeded Zhang Song's advice and ordered his subordinate Fa Zheng to lead 4,000 men to welcome Liu Bei into Yi Province, in addition to presenting Liu Bei with several precious gifts. Against the advice of Huang Quan who thought of the disadvantages of such a course and the remonstrances of the attendant Wang Lei (王累) from Guanghan (廣漢) who hanged himself at the city gate in sign of protest. However, Liu Zhang didn't listen to any of them and even ordered the different places to supply Liu Bei's army. Liu Bei led thousands of his troops into Yi Province and met Liu Zhang at Fu County (涪縣; present-day Mianyang, Sichuan). He also met Zhang Song and Fa Zheng who privately disapproved of Liu Zhang's governance and looked at Liu Bei as a solution for a legitimate successor. When Liu Bei met them, he welcomed them warmly and treated them with kindness. He used this opportunity to learn more about crucial information about Yi Province such as geography, supplies and deployment of military forces. Zhang Song even drew a map of Yi Province and gave it to Liu Bei. As time passed, Zhang Song conceived the idea of betraying Liu Zhang and helping Liu Bei seize control of Yi Province from Liu Zhang, so he contacted Fa Zheng, who agreed to join him. With their help, Liu Bei learned all about Yi province. Liu Zhang invited Liu Bei to join him in Yi Province to capture Hanzhong Commandery before Cao Cao did. Liu Bei led an expedition force of several ten thousands soldiers into Yi Province after leaving behind Zhuge Liang, Guan Yu, Zhang Fei and Zhao Yun to guard Jing Province. Liu Zhang welcomed Liu Bei, when they saw each other, both of them were friendly. Before this Zhang Song told Fa Zheng to report to Liu Bei, that with the counsellor Pang Tong backing, they could ambush Liu Zhang at