The calculated distance (air line) between Qingyuan and Yuen Long Kau Hui is approximately 107 miles respectively 173 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 Qingyuan and Yuen Long Kau Hui has been calculated here.
Air line (approximately)
173 kilometers
93 nautical miles