The calculated distance (air line) between South Horizons and Siu Lek Yuen is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Siu Lek Yuen is certainly longer, as only the direct route (as the crow flies) between South Horizons and Siu Lek Yuen has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles