The calculated distance (air line) between Yuen Long Kau Hui and Sau Mau Ping is approximately 16 miles respectively 25 kilometers.
By car or train, the actual journey to Sau Mau Ping is certainly longer, as only the direct route (as the crow flies) between Yuen Long Kau Hui and Sau Mau Ping has been calculated here.
Air line (approximately)
25 kilometers
14 nautical miles