The calculated distance (air line) between Heyuan and Yuen Long Kau Hui is approximately 98 miles respectively 157 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 Heyuan and Yuen Long Kau Hui has been calculated here.
Air line (approximately)
157 kilometers
85 nautical miles