The calculated distance (air line) between Tseung Kwan O and Siu Hei is approximately 18 miles respectively 30 kilometers.
By car or train, the actual journey to Siu Hei is certainly longer, as only the direct route (as the crow flies) between Tseung Kwan O and Siu Hei has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles