The calculated distance (air line) between Cheung Chau and Sau Mau Ping is approximately 15 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 Cheung Chau and Sau Mau Ping has been calculated here.
Air line (approximately)
25 kilometers
13 nautical miles