Korean currency
In 1902, won was introduced as the official currency unit replacing yang at 1 won = 5 yang. The bank of Korea was established 1909 but soon after in 1910, Imperial Japan annexed Korean Empire. Under Colonial rule, the country was made to use the currency unit "yen" in the name of Korean yen, which took over the Korean won at par. After the division of Korea, the state of South Korea was established and recognized in 1948, and won was again made the official currency of the new state. "jeon" was made the subunit of the currency that divided it into 100 equal parts. Bank of Joseon issued the currency for independent South Korea for the first time that too in banknotes only.
Slavery in the 21st century
In North Korea, the government forces many people to work for the state, both inside and outside North Korea itself, sometimes for many years. The 2018 Global Slavery Index estimated that 2.8 million people were slaves in the country. The value of all the labour done by North Koreans for the government is estimated at $975 million USD, with "dulgyeokdae" (youth workers) forced to do dangerous construction work, and "inminban" (women and girl workers) forced to making clothing in sweatshops. The workers are often unpaid. Additionally, North Korea's army of 1.2 million soldiers is often made to work on construction projects unrelated to defense.