The calculated distance (air line) between Hung Shui Kiu and Tai Koo is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Tai Koo is certainly longer, as only the direct route (as the crow flies) between Hung Shui Kiu and Tai Koo has been calculated here.
Air line (approximately)
29 kilometers
15 nautical miles