Considering nK waterways are highly polluted not sure fishing in the rivers is a good idea. “North Korea is known to have severe water pollution and ecosystem destruction in major rivers, water pollution and soil pollution in mining areas are serious, and water and sewage infrastructures in cities other than Pyongyang are known to be weak.” https://koreascience.kr/article/JAKO202012941166734.page
Considering nK waterways are highly polluted not sure fishing in the rivers is a good idea. “North Korea is known to have severe water pollution and ecosystem destruction in major rivers, water pollution and soil pollution in mining areas are serious, and water and sewage infrastructures in cities other than Pyongyang are known to be weak.” https://koreascience.kr/article/JAKO202012941166734.page