Apart from Cathay not sure who the other 3 would be... Oasis, Vietnam airlines?
Cathay would make sense as they already operate a regular freight route to MAN. Not sure who else though. Oasis went bust a few years ago. Air Asia might have been a possibility but I hear that they're withdrawing their European routes (though I stand to be corrected on that one). Maybe Jetstar from SIN? They have extensive connections All over the Pacific region. Beyond that I'd agree that one is likely to be Chinese.