The calculated distance (air line) between Tuen Mun San Hui and Mei Foo is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Mei Foo is certainly longer, as only the direct route (as the crow flies) between Tuen Mun San Hui and Mei Foo has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles