That pic was posted in a different forum and the people said that it's a real pic, but it's like 10 years old and from a Russian factory. That is why you see an Su-27sk being made for PLAAF with a Su-33 in the background.
very interesting jh-7b pic. for one, i see many characteristics, particularly the nose, taken from the su-34. iut reminds me of that iranian stealth plane issa showed us...
i guess the hardest part will be redisigning the engine area to fit al-31.