公安县
At the same time, tensions were rising at the Sun–Liu border in Jing Province as both sides became more suspicious of each other. Lu Su tried to reduce the tensions by being friendly towards Liu Bei's side. After Liu Bei took over Yi Province, Sun Quan asked him to return three commanderies in southern Jing Province – Changsha (), Lingling (零陵; around present-day Yongzhou, Hunan) and Guiyang (桂陽; around present-day Chenzhou, Hunan) – but Liu Bei refused. Sun Quan then ordered his general Lü Meng to lead his forces to seize the three commanderies by force. When Liu Bei found out, he returned to Gong'an County and sent Guan Yu to lead an army to stop Lü Meng.