The J-36 and J-50 are era-defining products.
Originally, the world’s major powers were competing below 20,000 meters, and stealth fighters were designed to be stealthy only from the front, rear, sides, and below. Then China ignored the usual playbook and came up with a “three-high” concept: 30,000-meter altitude, Mach 3 cruising speed, a 3,000-kilometer combat radius, and even three engines.
Fifth-generation fighters only considered stealth from the front, rear, sides, and below. From above, their stealth is not only poor, but their infrared signature is also bad. Leaving everything else aside, even the pilot cockpit has to account for radar reflections from directly overhead. Once the pilot wears a helmet, it can immediately reflect as a target roughly the size of a basketball.
A sixth-generation fighter against a fifth-generation fighter is completely like a higher-dimensional slaughter, let alone against fourth-generation fighters.