The calculated distance (air line) between Tsim Sha Tsui and Yuen Long Kau Hui is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to Yuen Long Kau Hui is certainly longer, as only the direct route (as the crow flies) between Tsim Sha Tsui and Yuen Long Kau Hui has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles