I still don't think this is an SSB.
I also dont think that this is a SSB. So many resources to develop a advanced platform with just one unit built just for weapon testing? no, i dont think thats true. Unless the chinese are very dumb.
Besides, the submarine has torpedo hatchs in the bow. What does an SSB need them?
I still don't think this is an SSB.
from the shape and size, i think its actually an attack submarine. maybe it can carry torpedo fired cruise missiles, does the Chinese have this technology yet?
Does C-802 qualify as cruise missile? Block 3 harpoon able to reconfigure into land attack cruise missiles.
PLAN has demonstrate they have the technology for tube torpedo launch attack missile. So I think PLAN even without it at the moment is not far off from mastering it.