Your reply just proved my last post, you keep insist on ignoring all those well explained previous post by other members. I am 1/2 Chinese so I m not all that good with my Mandarin but I think those previous post were about a superficial interview with Rear Admiral Ma and his wording were something like about "already applied" on the next gen submarine and has a lead on US about 10 years. Gee let me put the pieces together, USN already stated they are going to use the Rim-Drive on the next SSBN Columbia-Class of which will debut around 2030 of which is about 10 years away, hmmm you think about that, a technology lead Adm Ma stated 10 years away which is about from today that the US hasn't developed and stated it will be using on the next SSBN 10 years away from now. And of course no one will show you "direct evidence" of a sensitive military asset. You are sounding like those religious fanatics or climate change deniers unless a "direct evidence" is shown to you that either GOD do or do not exist. Get out of the basement or your room and breath some fresh air and use some common sense, it was a superficial news interview with a credible respected professor admiral he briefly replied a lead on a more advanced sub system component just because he didn't reveal the whole shenanigans doesn't mean he doesn't have it just means he is being professionally secretive about his job, you keep insist I prove the impossible , I m neither a spy nor I work for PLA. You are like those annoying child keep asking why continuously forever and thought somehow this will put the burden of prove on me. Quit bugging me with these stupid questions just go read the previous post by Superdog