The calculated distance (air line) between Tuen Mun San Hui and Tsuen Wan is approximately 9 miles respectively 14 kilometers.
By car or train, the actual journey to Tsuen Wan is certainly longer, as only the direct route (as the crow flies) between Tuen Mun San Hui and Tsuen Wan has been calculated here.
Air line (approximately)
14 kilometers
8 nautical miles