View attachment 163387
Seems to be the same aircraft/model, allegedly taken at an RCS testing facility a few months ago
There were non-reputable folks on Chinese forums claiming right after J-36 reveal in December 2024 that there was a J-36 looking aircraft (triangular and simple geometry unlike J-50) that is high supersonic. Recall one blurry, super zoomed in image of an otherworldly looking and an exhaust trail. The image does tend to resemble this thing. We all ignored it since there wasn't much more info behind it and came from some randoms.
Having said that, that rumour and the performance assigned to that theoretical aircraft was also mistakenly tied to the J-36 hence lots of chatter of J-36 being high supersonic until reputable sources mentioned that J-36 is not designed for even mid to high supersonic implied mach 2.5+