The calculated distance (air line) between Sau Mau Ping and Siu Hei is approximately 18 miles respectively 28 kilometers.
By car or train, the actual journey to Siu Hei is certainly longer, as only the direct route (as the crow flies) between Sau Mau Ping and Siu Hei has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles