The calculated distance (air line) between Yŏch’im-dong and Kangnyŏng is approximately 180 miles respectively 290 kilometers.
By car or train, the actual journey to Kangnyŏng is certainly longer, as only the direct route (as the crow flies) between Yŏch’im-dong and Kangnyŏng has been calculated here.
Air line (approximately)
290 kilometers
157 nautical miles