The Shenyang 601 Institute has been working for some years now on what might be a competition for Chengdu's J-20. Here's a handful of pics( sorry, can't remember the site, I think it was a Pakistani defence forum) of a model strongly resembling the blurred windtunnel model from Huitong's site. It is also Huitong who suggests a full-scale mock-up Shenyang J-19 has been built. Note the puzzling designation on the tail-F-60? This might suggest that (in case of losing to the J-20?) it is export-oriented, like the JF-17. Along with the stealthified J-11, JF-17, JH-7 and an LO replacement for the J-15, looks like an unprecedented cornucopia of LO airframes will soon be churned out by the Chinese.