The calculated distance (air line) between To Kwa Wan and Yuen Long San Hui is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Yuen Long San Hui is certainly longer, as only the direct route (as the crow flies) between To Kwa Wan and Yuen Long San Hui has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles