Institute for Far Eastern Studies NK Brief No. 08-1-29-1 It is being reported that North Korea’s Chungnyun Mine, in Hyesan, Ryanggang Province, is facing severe economic difficulties due to floodwater. Hyesan mines produce 80 percent of all North Korean copper, and the North had estimated that it will be able to continue mining copper there … Continue reading DPRK’s largest copper mine flooded with difficulties