The calculated distance (air line) between Greenwood Terrace and Sheung Shui is approximately 19 miles respectively 30 kilometers.
By car or train, the actual journey to Sheung Shui is certainly longer, as only the direct route (as the crow flies) between Greenwood Terrace and Sheung Shui has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles