Prototype J-20 first testing flight successfully conducted,

edisonone

Compare Aeronautics:

SR-71 Blackbird:

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J-20:

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The SR-71 and the J-20 clearly exhibits superior aeronautic configuration which was designed for super high Mach speed. See how far back the wings are as compared to those of F-22 and PAK-FA. With wings that far back, it enables the air craft to go like hell exactly as that of a missile. With wing this far back, if it weren't for the added canards to give it extra lift, the J-20 would lose control simply drop out of the sky erat low subsonic speeds.  Yes, the positioning of the wing and and the sporting of canards tell us how a plane would react with the airflow.

I still insist it can dash up to Mach 3 for brief periods and supercruise @between Mach 2.2. 2.3, even 2.5 range all the way.