The calculated distance (air line) between Ping Shan and Sha Tin Wai is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Sha Tin Wai is certainly longer, as only the direct route (as the crow flies) between Ping Shan and Sha Tin Wai has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles