China and Russia began joint naval drills in the Sea of Japan on Sunday as they seek to reinforce their partnership and counterbalance a US-led global order.

Alongside economic and political ties, Moscow and Beijing have strengthened their military cooperation in recent years, and their relations have deepened since the outbreak of the Ukraine war in February 2022.

The “Joint Sea-2025” exercises kicked off in waters near the Russian port of Vladivostok and would last for three days, China’s defense ministry said in a statement on Sunday, AFP reported.

The two sides will hold “submarine rescue, joint anti-submarine, air defense and anti-missile operations, and maritime combat.”

Four Chinese vessels, including guided-missile destroyers Shaoxing and Urumqi, are participating in the exercises alongside Russian ships, the ministry said.

After the drills, the two countries will conduct naval patrols in “relevant waters of the Pacific.”

China and Russia have carried out annual drills for several years, with the “Joint Sea” exercises beginning in 2012.

Last year’s drills were held along China’s southern coast.

The Chinese defense ministry said Friday that this year’s exercises were aimed at “further deepening the comprehensive strategic partnership” of the two countries.