TSL | Taiwan Sing Language Gleaning

Straighten all five fingers of one of your hands, close all except the thumb, face the finger tips forward, and face the palm sideways; curve the index finger of the other hand, pretend to nip a key with your thumb and index finger, and turn the key on the palm of the first hand; then, press the second hand downward while opening it into a claw. In short, you first pretend to turn a key on a door, and then refer to a location. It is said that Chiayi was pronounced the same way in Japanese as key, hence the sign for key was combined with that for location to refer to the county of Chiayi.