Answer: Sea of Japan
Notes: China and Russia began joint naval drills called “Joint Sea-2025” on August 3, 2025, in the Sea of Japan. The exercises aim to strengthen their strategic partnership and counter the United States-led global order. The drills are being held near the Russian port of Vladivostok. Operations include submarine rescue, anti-submarine, air defence, anti-missile, and maritime combat exercises. Four Chinese warships, including guided-missile destroyers Shaoxing and Urumqi, are participating with Russian ships.
