The calculated distance (air line) between Choi Wun and Tin Shui Wai is approximately 16 miles respectively 26 kilometers.
By car or train, the actual journey to Tin Shui Wai is certainly longer, as only the direct route (as the crow flies) between Choi Wun and Tin Shui Wai has been calculated here.
Air line (approximately)
26 kilometers
14 nautical miles