Starting from the late 1970s, when he was appointed faculty dean and later president of the Kim Chaek University of Technology, Choe took a more prominent role in the country's politics.
This was the first time he led North Korean delegations on official visits, which later included journeys to the Soviet Union, East Germany, China, and Bulgaria in 1984–1985.
[1] On 6 January 2007, at a mass rally in Pyongyang, he gave a speech praising the North Korean government for building nuclear weapons.
[3] On 19 October 2012, he met Zandaakhuu Enkhbold, the Mongolian parliamentary speaker, and the two countries "agreed on the future possibilities of bilateral trade and cooperation in the fields of information technology and human exchanges.
"[4] Choson Sinbo, a pro-Pyongyang newspaper in Japan, said that Mongolia was interested in exporting coal, copper, gold, and uranium through Rajin Port because it was "costly to rely on Chinese and Russian railway systems.