The calculated distance (air line) between Shiqi and Yuen Long Kau Hui is approximately 42 miles respectively 67 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 Shiqi and Yuen Long Kau Hui has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles