The calculated distance (air line) between Tai Shui Hang and Mong Kok is approximately 7 miles respectively 11 kilometers.
By car or train, the actual journey to Mong Kok is certainly longer, as only the direct route (as the crow flies) between Tai Shui Hang and Mong Kok has been calculated here.
Air line (approximately)
11 kilometers
6 nautical miles