Pretty easy track with the techno we have. Besides, we see them first, they're slag.
While the J-20 is just a cheap inferior copy of an advance American fighter, we must realize that they are not meant to confront American fighters one-on- one. The Chinese government will mass produce these fighters and our carrier force fighters could be facing off with odds of ten- to - one( if not more). While I am confident that we could easily defeat multiple targets in a engagement, the overwhelming numbers will be against us. If our fighter gets lucky and takes out 3-4 J-20’s , there will still be many more heading to an unprotected target. With our current government destroying our economy and our ability to protect ourself,it is just a matter of time till the Chinese take a large part of Asia under their “influence”