HI Sutton, the submarine expert who works for Naval News (not sure if he is still a staff member), believed these images to be the pre-assembled parts of the new Type 95 Sui class SSN. The article below is dated from February.
This is the analysis Sutton offered to support this conclusion:
"The hull section is approximately 30-32 meters long and roughly 11-12 meters across. This points to the new Type-095 and Type-096 boats. The other possibility is an improved version of the current Type-093 Shang-class. This would logically be the Type-093B cruise-missile optimized version. This is expected to feature vertical launch tubes similar to the Russian Yasen class. These will allow it to carry more YJ-18 cruise missiles.
However the approximate measurements are making the completely new classes a safer bet at this stage.
These new classes will be more advanced than the Type-093, with increased levels of stealth. The Type-095 in particular may become very relevant if the PLAN increases its prescience in the Indian Ocean."
Thought this might be interesting to some.
If the module is 11-12 meters across, then it isn't indicative of a 095 under construction. In fact, much the opposite. One of the rumors we heard was that the 095 will be partially single-hulled, and 11-12m on the stern doesn't fit the bill assuming that rumor is true. Pretty much everything is still up in the air regarding submarines so it's best to just sit and wait before jumping to conclusions. Even Sutton has been a bit too lenient with his research as of late, all the more reason to take his articles with a pinch of salt.