His first work was "Scenery of Pothong Gate" (1932) he painted in his schooldays. But his talent was disregarded under the colonial rule of the Japanese imperialists over Korea.

After the liberation of the country, he became famous by successfully creating the portrait of President Kim Il Sung, the first of its kind, to be hung in the place of mass rally held in Pyongyang to welcome the President's triumphal return to homeland.

He created many works portraying the leader, including "President Kim Il Sung Drawing up the Ten-Point Programme of the Association for the Restoration of the Fatherland" (1956), "Dawn Is Breaking over Homeland" (1966) and "We Will Follow the Leader Only" (1982).

His oil painting "The Torch in Pochonbo" is of great historical significance as it was created on the basis of a sketch he made at an audience when the President met writers and artistes on May 7, Juche 35 (1946). The painting gives a vivid portrayal of the President commanding the Pochonbo Battle during the anti-Japanese armed struggle.

Among his works are posters "Servicepersons, Take Our Revenge upon the Enemy!" (1951) and "Let Us Return Blood for Blood" (1951) and oil paintings "Mercenaries for Wall Street Warmongers" (1952) and "Steelworkers" (1957).

Working as chairman of the C.C., Artists Union of Korea from 1949, he made a big contribution to developing Juche-based fine art.

President Kim Il Sung and leader Kim Jong Il met him on several occasions and gave important instructions for the development of Juche-based fine art, appreciating his talents.

Jong was buried at the Patriotic Martyrs Cemetery after his demise.