As the most advanced stealth fighter of the Russian military at present, the dynamics of the Su-57 has attracted the attention of the West. The British Ministry of Defense confirmed in the latest defense intelligence on the 9th that the Soviet Union - 57 had been involved in the Russian-Uzbekistan conflict. The US "Power" website said on the 9th that although the British Ministry of Defense did not provide the exact information source on which the relevant assessment was based, it confirmed that the Su-57 had been put into practice "at least since June 2022". According to the assessment of the British Ministry of Defence, "the tasks carried out by the Su-57 may be limited to flying over Russian territory and launching long-range air-to-ground or air-to-air missiles to Ukraine". This will help explain why there is no confirmation of the Su-57's operation over Ukraine. The British Ministry of Defence also released a satellite photo on its Twitter homepage, which was taken on December 25, 2022, showing that at least five Su-57 fighter jets were deployed at the Ahtubinsk Air Force Base in southern Russia. According to the report, this base is the only known Su-57 base, which means that "these (Su-57) fighters may have participated in military operations against Ukraine." The British side said that the reason why the Su-57 adopts the long-range combat mode is that the effective range of weapons and sensors they carry is quite far, and they can play a role without venturing into Ukrainian airspace or using stealth functions to penetrate. "Power" website said that the Su-57 was equipped with an R-37M ultra-long-range air-to-air missile with a range of up to 200 kilometers, which had appeared over Ukraine last summer. In addition, the K-77M air-to-air missile specially developed for the Su-57 has a range of 160 kilometers, which allows the Su-57 to launch a long-range attack on Ukrainian air targets in the safe Russian airspace. Another use of the Su-57 in the Russian-Uzbekistan conflict is to use advanced sensor equipment and communication data links to serve as electronic intelligence and command aircraft and provide real-time intelligence for other aircraft. The MiG-29 pilot of the Ukrainian Air Force had previously described that the Russian army usually only dispatched two or four Su-30 and Su-35 fighter planes against the Ukrainian Air Force, but more than 12 fighter planes were on the rear guard. "Sometimes we find about 24 Russian fighter planes in the air near the border and try to launch missiles at us." However, the website of "Power" believes that the use of long-range combat mode in the Su-57 does help reduce risks, but also harms its operational effectiveness, and raises doubts about the actual performance of the Russian stealth fighter, affecting the export prospects of the aircraft. (Outlook New Era)