The calculated distance (air line) between Tai Mong Tsai and Choi Wun is approximately 7 miles respectively 12 kilometers.
By car or train, the actual journey to Choi Wun is certainly longer, as only the direct route (as the crow flies) between Tai Mong Tsai and Choi Wun has been calculated here.
Air line (approximately)
12 kilometers
6 nautical miles