South Korean military personnel said on the same day that six Russian military aircraft flew into the air defense identification zone (hereinafter referred to as the “defense zone”) near Dokdo in the east of South Korea the morning before, and stayed for about 20 minutes. After that, they went south along the overlapping area of the South Korean defense zone and the Japanese defense zone and flew out of the Japanese defense zone. Two Russian tu-95ms strategic bombers were flying over the East China Sea and the high seas of the Northwest Pacific Ocean, the report said, citing a news release the day before by the Russian Ministry of defense. The analysis shows that the Russian military aircraft may have flown into the South Korean defense zone in the process of carrying out the mission. It is speculated that, including the two bombers, a total of six Russian military aircraft flew into the South Korean defense zone. According to the Yonhap news agency, the South Korean army took immediate measures to deal with the situation. According to relevant regulations, the air force will immediately send f-15k and kf-16 fighters to accompany the South Korean military aircraft once it finds that foreign military aircraft have flown into the South Korean defense zone. According to the analysis, the Russian military aircraft’s move may be aimed at the six US strategic bombers’ training in Japan’s coastal waters on the 17th. Some analysts also pointed out that the move was also intended to test the response measures of the South Korea and the United States military in the South Korea US joint military exercise. It is worth mentioning that Russia does not recognize the anti recognition zones defined by various countries. In October last year, the South Korean military protested that Russian planes had repeatedly intruded into the South Korean defense zone. At that time, the Russian Ministry of defense responded that it would not be a problem unless it was a violation of airspace.