Sure, the likelihood that it's not at all nuclear doesn't seem great. But it could possibly be an answer to the Type 041, IF indeed that project stalled and has been essentially cancelled. Maybe this sailess sub is another try at a low-power nuclear reactor concept. With a more powerful reactor pack than one that was put in the Type 041, yet one that is still not comparable to proper high speed nuclear attack subs like 093 and 095. Basically, we don't know almost anything, so speculation like this is rampant...