The calculated distance (air line) between Yau Tong and Tuen Mun San Hui is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Tuen Mun San Hui is certainly longer, as only the direct route (as the crow flies) between Yau Tong and Tuen Mun San Hui has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles