Casse-tête chinois pour le Judoka - Marc Briand (1967) - Kat Hing Wai, Kam Tin

The nefarious organisation's base is the Kat Hing Wai walled village in Kam Tin. pretty much the only recognisable thing about this place now is the wall, almost every building within has been redeveloped into modern style village houses.

This is the west wall and entrance of the village