The calculated distance (air line) between Pak Shek Kok and Choi Wun is approximately 6 miles respectively 10 kilometers.
By car or train, the actual journey to Choi Wun is certainly longer, as only the direct route (as the crow flies) between Pak Shek Kok and Choi Wun has been calculated here.
Air line (approximately)
10 kilometers
6 nautical miles