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CCLSC
Air NZ from SIN-AKL should be a better flight to aim for than HKG-AKL. By next March SIN-AKL will be the new 777s with new business class suites and avod (audio-video on demand), while HKG-SIN will still be 767s with old business class and limited to 8 channels IFE (also small screens).
The alternative SQ flight is SQ285 (not 25).