If China builds an LHD, they'll have to navalize the Z-10, or some other helo like the Z-9. An LHD without attack aircraft is basically an enlarged, glorified LPD without the traditional capabilities of LHD's, i.e. airborne attack.
They need to do work to navalize it and there hasn't been any evidence that will happen. The only thing likely to happen is getting Z-15 to do some kind of roles like that, but we will have to see.