The calculated distance (air line) between So Uk and Yuen Long Kau Hui is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Yuen Long Kau Hui is certainly longer, as only the direct route (as the crow flies) between So Uk and Yuen Long Kau Hui has been calculated here.
Air line (approximately)
18 kilometers
9 nautical miles