Oh yeah?
中央军委批准中国人民解放军唯一新闻门户网站
So is CCTV the official media outlet of PRC/CCP who is the boss of PLA, but that does not stop CCTV from making all kinds of report including some very unreliable news. Remember that the two admirals made some quite off-mark statements in CCTV talk shows? How authoritative are they? And now, over the sudden, this 81.cn becomes absolutely authoritative? More so than People's Daily and CCTV? Why?
I think based on what we have heard (Russian source, I forgot his name) and seen (blurred photos with Russian camo), it is equally right and wise for people to keep their doubt equal to your believing it.
There isn't really much to argue about the deal right now. But no need to challenge people with different views, let go of it. I do encourage you to remind the other doubters when you find some high quality Su-35 photos in PLAF color. And I am sure many people including myself will be glad to thank you for settling the whole saga once for all.