China flights
Although genuinely not seeking to denigrate BHX's coup in the race for a permanent scheduled link to mainland China, surely the fact that last year's BHX-China and this year's are operated by different carriers highlights what this is - a charter operation?
Prestigious though they obviously are, if these flights were in any way a trial series in advance of a possible full scheduled operation, and if this year's extended run is due to last year's success, sure we'd be seeing CZ again? The switch to HU indicates this is a block booking on the cheapest available charter operator, rather than a teaser for a more permanent connection.