The calculated distance (air line) between Shiyan and Nanzhang Chengguanzhen is approximately 86 miles respectively 138 kilometers.
By car or train, the actual journey to Nanzhang Chengguanzhen is certainly longer, as only the direct route (as the crow flies) between Shiyan and Nanzhang Chengguanzhen has been calculated here.
Air line (approximately)
138 kilometers
74 nautical miles