According to M.Episkopos
According to media reports, the Russian Navy is represented by the following units of the country's Pacific Fleet: Udaloy-class destroyers Admiral Panteleev, Steregushchy-class corvettes, Hero of the Russian Federation Aldar Tsydenzhapov and Loud, diesel-electric attack submarines Ust -Bolsheretsk ", coastal minesweepers, missile boats and rescue tugs. The Chinese People's Liberation Army (PLA) navies include the 051D-class Nanchang missile destroyer, the 052D-class Kunming missile destroyer, the 054A-class frigates Binzhou and Liuzhou, as well as diesel-powered submarines, supply ships and a rescue vessel. According to the statement provided, the Chinese ships arrived in Peter the Great Bay on October 13. The ships were joined by a naval aviation contingent of twelve Russian and Chinese helicopters and aircraft.
Chinese state media sources said the exercises will include joint anti-aircraft and anti-submarine operations, as well as naval maneuvers and strikes against naval targets. The Russian Defense Ministry added that coordinated artillery fire and movements aimed at cordoning off the imaginary enemy's submarines will be practiced during the exercise. Joint Sea 2021 will mark the first time that the Chinese military will send anti-submarine aircraft and heavy destroyers for overseas exercises. A press statement accompanying the exercise noted that the first joint Russian-Chinese naval exercise took place in the Yellow Sea in 2005 as part of the Peace Mission 2005 exercise.
Joint Sea 2021 follows Australia's recent deal with the United States to acquire a fleet of eight nuclear-powered submarines and the AUKUS tripartite security pact between Washington, London and Canberra. Beijing strongly condemned AUKUS, which is seen as a deterrent to Chinese military power in the Pacific, as "a product of the Cold War mentality and narrow geopolitical concepts." Li Song, China's Ambassador for Disarmament Affairs, added that "such cooperation in the field of nuclear submarines is a textbook example of nuclear proliferation that violates the spirit of the Nuclear Non-Proliferation Treaty."
In addition, the Chinese side was alarmed by news that the USS Connecticut (SSN 22) Seawolf-class fast submarine collided with an unknown object during an undeclared mission in the South China Sea. The PRC demanded a "satisfactory explanation" from Washington.