I am sure you are right, Tankertrashnav, as 1966 and the Cultural Revolution put a stop to many such things. I think an added incentive to display the Spitfire in the early 60s was the 'influence' of two Battle of Britain veterans in post as AOCs Hong Kong, Air Commodore (then) Crowley-Milling in 1964, followed I think by Air Commodore Bird-Wilson.