The Sino-Russian joint patrol is intended to practice interoperability between the two air forces—and to test the response times of the United States, Japan, and South Korea.

Russia and China recently conducted their 11th “joint strategic patrol” since 2019—sending a large mixed formation of bombers, fighters, tankers, and surveillance aircraft over the Sea of Japan, the East China Sea, and the western Pacific.

US and Japanese aircraft, including F-35A Lightning IIs and F-15 Eagles, intercepted the Russian-Chinese patrol, underscoring the flashpoint potential of strategic bomber patrols. Beyond the size of the formation, the patrol illustrates the increasingly sophisticated military coordination between Beijing and Moscow.

Which Aircraft Were Involved in the China-Russia Joint Patrol?

Chinese aircraft in the patrol included four H-6 strategic bombers, six J-16 Hidden Dragon multirole fighters, a Y-20 aerial refueling tanker, a KJ-500 AEW&C aircraft, a Y-9 SIGINT/electronic intelligence aircraft, and multiple J-10 Vigorous Dragon and J-11 fighters. The Russian aircraft in the patrol included two Tu-95 Bear strategic bombers, two Tu-142 maritime patrol aircraft, Su-30 fighters, Su-35 Fulcrum-F fighters, and an Il-78 aerial refueling tanker.

The flight profile of the patrol featured Chinese bombers departing mainland China with Russian bombers joining over the Sea of Japan. The formation then flew south toward Okinawa and continued into the western Pacific, turning north before returning. The total patrol lasted some 6 hours in total. In response, the Japan Air Self-Defense Force (JASDF) scrambled its F-15 fighters, while US Air Force F-35As also intercepted the patrol. Separately from the US-Japanese response, South Korea’s air force also launched fighters after patrolling aircraft briefly entered its Air Defense Identification Zone (ADIZ). No weapons were fired on either side, and the missions remained in international airspace at all times. 

Russia and China have multiple reasons for conducting their joint patrols. The missions serve to demonstrate China-Russia military cooperation, while allowing both sides to practice long-range bomber coordination. The exercise improves interoperability between two separate air forces, including aerial refueling and command-and-control. Chinese and Russian crews likewise gain familiarity operating near Japanese and allied defenses. And ultimately, the patrol forced various militaries in the region to scramble interceptors and monitor activity. This can help both Beijing and Moscow gain familiarity with US, Japanese, and Korean response times.

Over time, this sort of response can be taxing—it imposes wear-and-tear on allied aircraft, increasing maintenance and cost requirements. Moreover, the missions can breed a degree of complacency on observers’ part, normalizing patrol behavior that could turn aggressive with little warning. If such patrols become routine, regional air forces may come to view the patrols as relative non-events, letting guards “relax” before a surprise attack.

The Sino-Russian Patrols Are More Menacing Than Ever Before

Notably, these patrols are becoming both larger and increasingly complex over time. The integration of bombers, escorts, tankers, and airborne command aircraft reflects more realistic operational training. The patrol also demonstrates that China and Russia can coordinate air operations across multiple maritime theaters simultaneously. For Japan and the US, these flights require continuous surveillance, rapid fighter scrambles, and close coordination between allied air-defense networks. The timing of the patrol is also notable; it occurred during the US-led semi-annual Valiant Shield exercises, signaling that Beijing and Moscow intend to showcase their own ability to conduct coordinated strategic operations while allied exercises are underway.   

Although these patrols remain legal under international law, they have become an increasingly visible form of strategic signaling. Rather than preparing for immediate conflict, they demonstrate long-range reach while allowing Russia and China to continue improving their operational proficiency. The patrols also serve to remind regional allies that any future crisis in the Western Pacific could involve not just a Chinese response, but a Russian response as well. 

About the Author: Harrison Kass

Harrison Kass is a writer and attorney focused on national security, technology, and political culture. His work has appeared in Tablet, City Journal, The Hill, The Spectator, and The Cipher Brief. He holds a JD from the University of Oregon and a master’s in Global & Joint Program Studies from NYU. More at harrisonkass.com.

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