In 212, the warlord Liu Bei launched a campaign to seize control of Yi Province from Liu Zhang. Liu Zhang ordered his officers Liu Gui (劉璝), Leng Bao (冷苞), Zhang Ren, Deng Xian (鄧賢) and others to lead troops to Fu (涪; in present-day Mianyang, Sichuan) to resist Liu Bei, but they were defeated and forced to retreat to Mianzhu (緜竹).