Etymology of the Korean currencies
The won is the currency of both North and South Korea. "Won" is a cognate of the Chinese currency unit, the yuan (//), and the Japanese currency unit, the yen (; ¥), meaning "round object". The won is subdivided into 100 jeon ().
Juche
In 1956, Kim Il-sung declared "Juche" to be the guiding principle of the economy. After the devastation of the Korean War, North Korea began to rebuild its economy with a base in heavy industry, with the aim of becoming as self-sufficient as possible. As a result, North Korea developed what has been called the "most autarkic industrial economy in the world". North Korea received a lot of economic aid and technical assistance from the Soviet Union and China, but it did not join Comecon, the Communist common market. In the 1990s, it had one of the world's lowest rates for dependence on petroleum, using hydroelectric power and coal instead of imported oil. Its textile industry uses vinylon, known as the ""Juche" fiber", which was invented by a Korean and which is made from locally available coal and limestone. The history of the development of vinylon often featured in propaganda that preached the virtues of technological self-reliance. North Korea had 10,000 CNC machines in 2010. The first domestic homemade CNC machine was introduced in 1995 and in 2017 it has around 15,000 machines.