It's difficult to build up a modern industry and export goods when your country isn't even on most maps. However, the people of East Korea are not know for giving up easily
The main export good of East Korea is diluted salt. The salt is mined in an extensive network of profitable 'slave-mediated' salt mines. The mining industry of East Korea has been heavily praised by leftish dictators of the world and republicans of the USA alike.
On the home market the sex industry is by far the largest, and is mainly concentrated in Port Spurious, a strange little town a few kilometers not shown on most maps. Port Spurious is one of the largest ports in the world if you count the number of bordellos, massage parlours with happy endings, whorehouses and strip clubs which can be identified by their red markings. Port Spurious is located just outside GeoffP City about 5 km inland. It is therefore about 10 km from the East Korea Warm Current.
Port Spurious