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