Chinese and Russian warships transit simulated mined sea area during the naval exercise Joint Sea-2021 on the morning of October 15. The China-Russia joint naval exercise kicked off in waters near Russia's Peter the Great Bay on the afternoon of October 14, which focused on such training subjects as communications, mine countermeasures, air defense, live-fire shooting at maritime targets, joint maneuvering and joint anti-submarine missions. (eng.chinamil.com.cn/Photo by Sun Jingang)