The calculated distance (air line) between Nanjing and Huaiyuan Chengguanzhen is approximately 113 miles respectively 181 kilometers.
By car or train, the actual journey to Huaiyuan Chengguanzhen is certainly longer, as only the direct route (as the crow flies) between Nanjing and Huaiyuan Chengguanzhen has been calculated here.
Air line (approximately)
181 kilometers
98 nautical miles