Some rumors about the on-going military exerise in Dingxin:
2 J-20 vs J-10/11 backed by AWACS, J-20 shot down the AWACS first, then dominate the J-10/11 in combat, it is said J-10/11's radar cannot detect J-20 even within visual range, several J-10/11 are shot down within visual combat range.
Next few days, PLA may try anti-stealth radar array to develop tactics to defeat J-20.
Not sure about the radar installed on J-10/11 since it is depend on block/version of the fighters, however since all China's AWACS are equiped with AESA radar, so its safe to say J-20's LO is robust to AESA radar's detection.
http://lt.cjdby.net/forum.php?mod=viewthread&tid=2329857&extra=page=1
So far I think China should stop all other fighter's prodcution and pull full speed on J-20's production.