Russia and China held joint naval drills in the Sea of Japan on Friday.
They practised how to operate together and destroy floating enemy mines with artillery fire, the Russian defence ministry said in a statement.
The war games are part of naval cooperation drills between the two countries which run from October 14 to 17, and involve warships and support vessels from Russia's Pacific Fleet, including mine-sweepers and a submarine.
Moscow and Beijing have cultivated closer military and diplomatic ties in recent years at a time when their relations with the West have soured.
Two Chinese destroyers, a submarine and two corvettes were among the vessels Beijing had sent to take part in the drills, the Russian defence ministry said, saying they had dropped anchor in the Russian far east the previous day.
The combined force would practice shooting at targets designed to imitate enemy surface ships and hold air-defence drills involving Russian SU-30SM multi-functional fighter jets and helicopters, the ministry said.
South Korea and the United States will cut short annual joint military drills to five days from 11 and scale back some field training, the allies said on Wednesday, after President Donald Trump ordered a substantial reduction in US participation.
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An Israeli airstrike killed nine Palestinians at a police station in Gaza on Wednesday, medics said, two days after US envoy Jared Kushner ended a trip to the region that failed to push forward Donald Trump's plan to end the war in the enclave.
Thai schools conducted active shooter drills on Wednesday, as authorities moved to strengthen security measures two weeks after a 14-year-old opened fire at a school and killed at least eight people.