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