Agreed, but after about the tenth post concerning Russian technology, why the PLAAf bought the Su-35 and so on ?!!??
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China bought only 24 Su-35, and much of the reason for this is also political. China and Russia wanted to take the strategic cooperation to the "next level" - while at the same time Su-35 is nothing "special" since the plane is also offered to other countries. So in a way, Su-35 is in the same category as S-400, which is also being offered to basically any country that can pay, but China did Russia a good favor while Russia was and still is under serious economic pressure and when China buys something "first", that is a "sign" of quality - hence, Russia might get additional orders because of that - not from China, but from other countries.
But J-20 have progressed very fast and with excellent results. The same goes for FC-31. So that does not mean that China is "desperate" to buy Su-35. China likes to fill in a gap for additional number of fighters while retireing the old fighters, much less capable than Su-35. J-7 / J-8 etc being retired. So it's great to fill in the "hole" with 24 Su-35, but China never wanted a huge number of these anyway.
Now that J-20 and FC-31 are progressing fast, it's all good. The same goes with the stealth bomber than China will have ready by early 2020s. Ten years ago, China wanted to buy Tu-22 bombers from Russia, but today you wouldn't have chance to make China pay for a single Tu-22 bomber from Russia. China prefers upgrading and integrating their own versions of H-6K++ before China rolls out stealth bomber in the early 2020s.
This whole Su-35 deliveries VS J-20 reminds me of Sovremmeny deliveries between 2000 and 2006, China was waiting for Soveremmeny destroyers while China itself was pumping out stealthy destroyers like Type 052C from 2003 - 2004, after allready having Type 051C and Type 052B in active service.
The same thing you can say about Improves Kilo class SSK. China stopped ordering more of those, and China has a production of advanced Yuan-class SSKs. Russia on the other hand is still producing Improved Kilo, and has serious problems taking it to the "next level", which is supposed to be "Lada / Kalina"-class SSK.
Now, China is building cruisers while Russia is still testing a Gorskhov frigate.
I remember something funny back in 2010 - just before J-20 launch, when Russia say publicly saying what countries are going to buy PAK-FA / Su-57 and how many.
Needless to say - Russia has totally failed with the whole "projection".
http://www.pravdareport.com/russia/economics/13-09-2010/114900-sukhoi-0/
China was estimated as a "customer" buying "upto" 100 Su-57 from 2025 and onwards. Never going to happen, of course, because China doesn't need it. Neither is desperate India going to get 250 Su-57, because what going to be reality around 2025, is that China has a nice number of operational J-20 and very possibly FC-31, while India would have ZERO Su-57 and Russia only a handful of those.
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