The calculated distance (air line) between Cẩm Phả Mines and Yongning is approximately 142 miles respectively 229 kilometers.
By car or train, the actual journey to Yongning is certainly longer, as only the direct route (as the crow flies) between Cẩm Phả Mines and Yongning has been calculated here.
Air line (approximately)
229 kilometers
124 nautical miles