The calculated distance (air line) between Mid Levels and Hung Shui Kiu is approximately 15 miles respectively 23 kilometers.
By car or train, the actual journey to Hung Shui Kiu is certainly longer, as only the direct route (as the crow flies) between Mid Levels and Hung Shui Kiu has been calculated here.
Air line (approximately)
23 kilometers
13 nautical miles