According to legend, during the
Three Kingdoms period,
Guan Yu fought in Changsha, while crossing the river by boat, his broadsword accidentally fell into the river, his deputy general
Zhou Cang picked up the broadsword, and the river where the broadsword was pulled out was called "Laodao River" (; "Lao" means pick up and "Dao" means Guan Yu's broadsword). ==Administrative division==