From lyman2003 weibo, each h-6k should be able to carry 4 of these missiles and each missile might be as much as 3t. If I had to guess, this is probably between 2 to 3t, maybe a little heavier than B-611 and Kinzhal.
A few weeks ago, Ayi said on the podcast that they now have something better than YJ-12 for H-6K. I'm assuming this is it. It would be the logical progression from YJ-12 (which is already quite good). This missile should have advanced anti-ship seeker and be hypersonic. I would guess 800 to 1000 km in range depending on the warhead size. So more range and harder to intercept than YJ-12. H-6K/J just go more lethal. While I think it's possible they can put this on a J-15/16, I think it is probably unlikely since H-6K can carry them so much more efficiently.
Also, the large ballistic missiles we saw on h-6N are considered medium to long range ballistic missiles. My guess is they might go as far as 3000 km. So yeah, I see this as a pretty big improvement.
I do think that this missile is available for export. Maybe Pakistan would be interested in using it against IN. Although, I have no idea what platform they have that could launch it.