The calculated distance (air line) between Nanjing and Mengcheng Chengguanzhen is approximately 153 miles respectively 247 kilometers.
By car or train, the actual journey to Mengcheng Chengguanzhen is certainly longer, as only the direct route (as the crow flies) between Nanjing and Mengcheng Chengguanzhen has been calculated here.
Air line (approximately)
247 kilometers
133 nautical miles