Hi folks. I booked a trip that has CX on the 1st leg and HK Express on the 2nd leg where I'd be taking my road bike as a special luggage. I've already contacted CX and it's been noted, but just got a call from them saying I need to confirm the same with HK Express. HK Express are then telling me it's up to CX which confuses me. Anyone know what I should be doing or assume that the interline agreement will mean that when my bag is passed through HK that it'll make it onto the next flght. Any advice is appreciated.

FYI, the HK Express flight is under a CX flight number