New plasma stealth device targets specific areas, not entire aircraft.
According to a recent report from the South China Morning Post, Chinese scientists and engineers claim to have developed a plasma stealth device for military aircraft that is capable of rendering nearly any such aircraft undetectable by radar.
For those wondering, that is a american F-35A in the picture.
Edit: Also why do people assume stealth means invisable, there not the same thing.
Invisible*
*To specific detection systems within specific distances at specific times