 The Old Pillbox was constructed in the 1930s by the Royal Air Force; it was situated at a strategic nodal point of the former Royal Air Force Station at Kai Tak and roads connected to the Kai Tak Airport, bearing great significance as a defensive strongpoint at the time.During World War II, it was used as an air-raid shelter by the Japanese aircrew and technicians.It had been abandoned after the Japanese Occupation, and was later occupied by squatters.