North Korea recently released new promotional materials marking its vision for Rajin Sonbong in the northwestern part of the country. According to the Chosun Ilbo article, President Kim Il-Sung previously said: "Rajin-Sonbong must become a better city than Singapore when you establish an economic and trade zone there."
I can't think of better advertising for Choson Exchange as a Singapore-based organization supporting economic and commercial education in North Korea.