The calculated distance (air line) between Foshan and Yuen Long Kau Hui is approximately 70 miles respectively 113 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 Foshan and Yuen Long Kau Hui has been calculated here.
Air line (approximately)
113 kilometers
61 nautical miles