The calculated distance (air line) between Yuen Long Kau Hui and Cheung Chau is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to Cheung Chau is certainly longer, as only the direct route (as the crow flies) between Yuen Long Kau Hui and Cheung Chau has been calculated here.
Air line (approximately)
27 kilometers
14 nautical miles