Russian engine technology. The J-20 is a big prototype canard fighter that has some stealth features but we don't yet know how stealthy it is, but it doesn't l

Russian engine technology. The J-20 is a big prototype canard fighter that has some stealth features but we don't yet know how stealthy it is, but it doesn't look very. And there's very little information on the J-21/J-31 (naming unclear) but it looks like the JSF / F-22. It could perhaps be more stealthy.