In the period of Japan's colonial rule over Korea, its working masses had to undergo a slavery life, being subject to exploitation and oppression.

President Kim Il Sung liberated Korea through a protracted anti-Japanese armed struggle and turned the working masses into masters of their own destiny and the country.

His energetic and wise leadership served as a source of making the Korean workers fully display their devotion and heroism in production and construction at every stage of the developing revolution.

After the Korean War (1950-1953), workers of the Kangson Steel Plant turned out 120,000 tonnes of rolled steel at the blooming mill with a rated capacity of 60,000 tonnes, signaling the start of the Chollima movement. And those of the Kim Chaek Iron Works produced 270,000 tonnes of pig iron by equipment with a rated capacity of 190,000 tonnes.

The Korean workers manufactured a trial tractor in 30 days and a truck in 40 days for the first time in the country, while the socialist industrialization was carried out in a matter of 14 years.

They also gave a facelift to Pyongyang City in the 1970s and 1980s, working miracles in creation and construction.

General Secretary Kim Jong Il had always considered the working class to be driving force in building a thriving nation.

Encouraged by his deep trust, Korean workers effected fresh upsurges one after another in different economic sectors, making a breakthrough in building an economic power.

The Generalissimos' history of leadership over the working class continues still now under the wise guidance of respected Marshal Kim Jong Un, who shows all sorts of loving care for the workers, saying that Korean society is for them.