The calculated distance (air line) between Hong Lok Yuen and Choi Wun is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Choi Wun is certainly longer, as only the direct route (as the crow flies) between Hong Lok Yuen and Choi Wun has been calculated here.
Air line (approximately)
16 kilometers
8 nautical miles