evidence: Pronunciation [edit]Proper noun [edit]Ryanggang - A province of North Korea. Capital: Hyesan. [...] - Hyesan. The capital of the Ryanggang Province. Material was taken in a gorge, about 1000 m a.s.l., by the River Tuman-gang (China boundary) north-east of Hyesan (1 June). [...] - Darlene Tymo, the WFP’s country director in North Korea, said that although official statistics from the North Korean government are not out yet, the main harvest of the year is believed to have been worse than last year and that could mean especially remote and impoverished areas — particularly the mountainous provinces of Chagang and Ryanggang along the border with China — could be looking at a harsher than usual winter ahead.