The Su-30/35 was originally the mainstay of the Russian Air and Space Force and the Military Foreign Trade Department, but they were shot down one after another in the Russo-Ukrainian War, the main problem was that the Su-34 and Su-30SM fighters that carried out ground attack missions used low-altitude penetration and did not install infrared/ultraviolet missiles to approach the warning sensor;
The Su-30SM/34 is only equipped with the L-150 pastel radar alarm receiver: it only warns radar-guided anti-aircraft missiles and radio-directed anti-aircraft missiles that require fire control radar assistance; while the anti-aircraft missiles using optical infrared guidance and laser beam guidance have no early warning capability, and rely on the pilot's naked eye to find the smoke of the missile to avoid; infrared and ultraviolet warning sensors are not configured - in general, countries that buy Soviet-style heavy warfare will install a full set of missile approaching optical alarms - however Russia itself did not equip them in order to save money! In addition, what makes users embarrassed is that the Su-30SM has the ability to detect low-altitude movements/small targets, the navigation system is not good, and the Russian pilots have to carry out combat missions with civilian GPS... ；
Even the Su-35, equipped with a complete missile warning system and electronic warfare pods, was shot down while on an ultra-low-altitude mission — the ace fighter jet produced by the Russian military trade department: the Middle Chamber of Commerce hated it;
Before the war, the Soviet heavy war was returned by the user with "radar technology is not passed", the Russians were forced to continue to negotiate the problem of reloading AESA, from now on, in addition to the airborne radar, the Soviet heavy war fire control / airborne protection system has also had problems, once the conflict occurs Unless the user country has a perfect land air defense system similar to China and Russia, otherwise, the user country's Soviet heavy war is in crisis! Therefore, this Russian-Ukrainian conflict has given the users other ideas: the Soviet heavy war has never got rid of the foundation of the air superiority fighter, no matter what modifications Russia makes in the airborne equipment, it cannot become a successful multi-role fighter - which brings new opportunities for the export of other fighter models;
Dedicated air superiority fighters have lost market demand: costly and single-purpose! The Soviet heavy war of user-state procurement has entered the peak period of improvement;
As the most successful in improving the Soviet heavy war, China has a more perfect and advanced aviation industry and manufacturing level than Russia: China's Soviet heavy war is to break the code and improve itself, and the level of microelectronics industry technology is much higher than that of Russia - since the beginning of the 21st century, China's improved Soviet heavy war is fully in line with the strategic transformation of the Chinese Air Force; therefore, China also has a more practical technology for modifying soviet heavy warfare than Russia;
China's self-modified AESA J-11B heavy battle has been put into service: the use of integrated avionics system, the data bus using optical fiber, the glass cockpit using an integrated large-screen display system, the information capacity is larger, more intuitive display of air information and battlefield situation to the pilot; the use of infrared / ultraviolet missile approach warning sensor (gaze infrared focal plane array electrical scanning detection), while improving the ground precision ground strike capability;
It has a complete and mature advanced technology package, with affordable prices and reduced logistical costs - in line with the modification requirements of the user country: they can introduce China's cheap Soviet heavy war modification technology kits to "improve themselves", and squeeze the expensive Russian modification kits out of the Soviet heavy war modification market. However, this has greatly enhanced the national defense strength of the user country and protected Russia's strategic interests.