Just as an aside Flying Chinaman in the 70’s and early 80’s HK bus companies were purchasing time expired buses from the UK. The new buses in the 80’s and 90’s came from British manufacturer Leyland who sold out to Volvo, although the bodywork was still by British companies.
I think that they were supplied in “kit” form and assembled in HK. Some of the vehicles were shipped back to the UK when time expired in HK for further use. Stagecoach brought back some single deck buses with airconditioning as a novelty.