Flight testing On 17 March 2025, images and videos emerged on Chinese social media of the second public test flight of the J-36 prototype, without the chase aircraft. The new imagery provided additional details, confirming earlier observations on the prototype's trijet configuration with
afterburners, dorsal intake with the
diverterless supersonic inlet (DSI), streamlined
cockpit canopy, and split ruddervons on the outer
trailing edges of each wing. On 7 April 2025, the aircraft was captured in close-up imagery. Geolocation showed the aircraft was landing at the Chengdu Aircraft Corporation test facility, featuring a dedicated
aircraft shelter for the J-36. On 21 April 2025, the aircraft was seen performing maneuvers. On 23 April 2025, the aircraft was captured in a rear aspect view, displaying details such as engine exhausts sit inside of the trailing edge, and a cockpit that possibly features side-by-side seating for two pilots. Multiple flight testing continued in May and June 2025, with more detailed photographs emerging. The aircraft was confirmed to have a broad nose with large electro-optical aperture windows on the side, trapezoidal dorsal and lower air intakes, In October 2025, the second prototype of the J-36 started flight testing. Analysts observed some structural changes. The new prototype featured redesigned exhausts with two-dimensional
thrust vectoring petals instead of the recessed troughs, which would provide stronger maneuverability but less rear-aspect stealth. The revised side
intakes no longer had the caret-shaped surfaces; instead, it opted for
diverterless supersonic inlet (DSI). The new aft landing gears were changed from tandem to parallel fashion that likely save more internal space. In November 2025, an investigation conducted by
The War Zone on satellite images found that both Chengdu J-36 and
Shenyang J-XD aircraft were stationed between August and September 2025 at a Chinese military airfield near
Lop Nur, a place known to host top-secret aerospace test flights in China, akin to the United States
Area 51. Their appearances at the same base indicated the Chinese military was actively developing two advanced fighter programs in parallel. On 25 December 2025, the alleged third prototype of the J-36 was observed in Chengdu undergoing flight testing, which was followed by a
Chengdu J-10 as the chase aircraft. The third prototype lacked the pitot tube on the radome. ==Strategic implications==