The calculated distance (air line) between Kowloon Tong and Ping Shan is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to Ping Shan is certainly longer, as only the direct route (as the crow flies) between Kowloon Tong and Ping Shan has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles