Chollima; winged horse of East Asian mythologies
A mythical winged horse from East Asian folklore, especially associated with Korean culture. Often used metaphorically for rapid progress or speed.
from Korean
The Chollima is a legendary horse said to run a thousand ri in a day.
In North Korea, there was an economic development campaign called the Chollima Movement.
From Korean 천리마 (cheollima), literally 'thousand-ri horse', referring to a mythical horse capable of traveling great distances. The term is used in East Asian mythology and has been adopted into Japanese with the reading チョンリマ.