Pictures of Shenyang J-21 or J-31 (designation not confirmed yet) have emerged courtesy of CDF and SDF. The plane resembles closely with models earlier associated with possible second 5th gen fighter from China. This will be China's second 5th gen stealth fighter after J-20. The fighter has a striking resemblance with F-22 and F-35. This fighter may be targetted for export by Shenyang as CATIC did with JF-17.
The pictures have emerged during the times when tensions with Japan are high over disputed islands. Interestingly, US defense secretary Panneta will be visiting China next week. If you all remember, J-20 was unvieled during the former US secdef Gates (Panneta's predecessor) visit to China. Coincidence or not, you decide.