The calculated distance (air line) between Shantou and Yuen Long Kau Hui is approximately 180 miles respectively 289 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 Shantou and Yuen Long Kau Hui has been calculated here.
Air line (approximately)
289 kilometers
156 nautical miles