Ri Chol Guk (李哲國) is one of North Korea players.
In fact, the skills of North Korea players are quite good as they are trained as hard as those in Japan and South Korea.
Unluckily, the nation's budget for table tennis is very limited (a few money to buy air tickets and book hotel). Therefore, the North Korea players have a few chance to take part in the international competition, particular the Open Competition. As a results, their world ranklings are unreasonably low.