The calculated distance (air line) between Cheung Chau and Choi Wun is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Choi Wun is certainly longer, as only the direct route (as the crow flies) between Cheung Chau and Choi Wun has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles