Chi are turret-like protruding sections placed at regular intervals along a fortress wall from which defenders could protect the fortress and drive back an approaching enemy. There are ten such structures at Hwaseong. The term chi, which literally means "a pheasant," was applied to these structures because pheasants are adept at hiding and remaining watchful. Yongdodongchi is located to the east of Yongdo, a passageway along the outer perimeter of the fortress used by patrols.