The whereabouts of the PLA Liaoning fleet have attracted great attention from the Japanese media for several days. According to Kyodo News Agency on the 19th, the Ministry of Supervision of the United Staff of the Ministry of Defense of Japan announced on the 18th that the Chinese naval aircraft carrier Liaoning was found taking off and landing fighter planes and helicopters in the Pacific Ocean south of Okinawa on the 17th. This is the second time that the aircraft carrier formation of Liaoning Ship has gone out of the Western Pacific for training this year. Experts interviewed by the Global Times believe that this shows that the exercise of Liaoning Ship going out of the island chain tends to be normalized. According to the Daily News of Kyodo News Agency 19, Japan's air force closely monitored the training of Liaoning's carrier based aircraft for about 6 hours from around 11:00 on the 17th to around 17:00. The Japanese Maritime Self Defense Force frigate "Mist Rain" was under surveillance, and the aircraft of the Air Self Defense Force "took off urgently". According to the report, China may have implemented some kind of training. The Ministry of Defense said that the Liaoning warship and other Chinese warships went down to the Pacific Ocean from the eastern Hainan on the 16th through the sea area between Okinawa and Miyako Island. On the 17th, about 260 kilometers southwest of Chongdadong Island, a total of five ships sailed in formation with two missile destroyers, one frigate and one high-speed combat support ship. According to the news released by the Ministry of Integrated Staff and Supervision of the Ministry of Defense of Japan on the 16th, the escort formation of Liaoning warship includes the 055 destroyer Anshan Ship, Wuxi Ship, 052D destroyer Chengdu Ship, 054A frigate Zaozhuang Ship and a 901 comprehensive replenishment ship Hulun Lake Ship. Kyodo News Agency said that the Liaoning warship stayed in the Pacific Ocean for about 3 weeks in May this year and about 10 days in December last year. Both took off and landed shipborne fighters. The action of several PLA ships before the Liaoning fleet, which was hyped as "Chinese survey ships invading Japan's territorial waters", also attracted Japanese attention. On December 15, the Ministry of Supervision of the United Staff of the Ministry of Defense of Japan announced that the Maritime Self Defense Force had found a "modern" class ship of the Chinese navy passing through the sea area between Okinawa and Miyako and heading for the Pacific Ocean. Prior to this, the Ministry of Supervision of the United Staff of the Ministry of Defense of Japan announced on the 14th that four Chinese naval vessels had sailed into the Pacific Ocean from the East China Sea that day, namely, the 055 Lhasa, the 052D Kaifeng, the 815 electronic reconnaissance ship Kaiyang Star and the 903 ocean going integrated supply ship. The Japanese side reported that after the 12th, the intelligence gathering ship went south along the East China Sea side of the islands from Kagoshima to Okinawa, and then drove across the sea area between Okinawa Island and Miyako Island. Two missile destroyers and one supply ship sailed eastward into the Pacific Ocean through the Dayu Strait on the 13th. The patrol aircraft and ships of the Maritime Self Defense Force have monitored Chinese ships. The Kyodo News Agency reported that, according to the Japanese Defense Ministry, the Chinese survey ship sailed westward at about 3:20 a.m. in the sea area about 50 kilometers southeast of the Tanegashima Island. After entering the adjacent area outside the "territorial sea" from the south of Tanegawa Island, the ship entered the "territorial sea" from the south of Ukushima Island at about 6:50 a.m., then moved within the "territorial sea", and left from the west of Kouyong Liangbu Island at about 10:00 a.m. Military experts interviewed by Global Times believed that Chinese ships entered Japan's so-called "territorial waters"