After a number of Russian warplanes on the Ukrainian front were shot down, Russia sent Su-57 fighters to fight the Su-57 for the first flight of the Su-57 led by the Russian Sukhoi Design Bureau in 2010 according to the Russian side

After many Russian fighters on the Ukrainian front were shot down, Russia sent Su-57 fighters to fight The Su-57 was developed by the Russian Sukhoi Design Bureau For the first flight in 2010 According to russia, the Su-57 fighter has an unparalleled and most advanced system At present, there are 3 russian fighters, but in 2019, the first mass-produced Su-57 crashed shortly after it rolled off the line