The calculated distance (air line) between Thái Nguyên and Cung Kiệm is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Cung Kiệm is certainly longer, as only the direct route (as the crow flies) between Thái Nguyên and Cung Kiệm has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles