The calculated distance (air line) between Tianshui and Linxia Chengguanzhen is approximately 160 miles respectively 257 kilometers.
By car or train, the actual journey to Linxia Chengguanzhen is certainly longer, as only the direct route (as the crow flies) between Tianshui and Linxia Chengguanzhen has been calculated here.
Air line (approximately)
257 kilometers
139 nautical miles