The drills come weeks after a UN-backed tribunal ruled this month that China did not have historic rights to the hotly contested waters Russia is to hold joint naval exercises with China in the South China Sea in September as tensions escalate over the fiercely contested islands.
China’s Defence Ministry insisted the “routine” drills were aimed at strengthening their co-operation and were not aimed at any other country.
But they come at a time of heightened tensions in the region after a UN-backed tribunal ruled this month that China did not have historic rights to the waters.
China rejected the ruling and refused to participate in the case.
“This is a routine exercise between the two armed forces, aimed at strengthening the developing China-Russia strategic cooperative partnership,” China’s defense ministry spokesman Yang Yujun told a news conference.
“The exercise is not directed against third parties.”
China claims most of the South China Sea, through which more than $5 trillion of trade moves annually. Brunei, Malaysia, the Philippines, Taiwan and Vietnam have rival claims.
China has repeatedly blamed the United States for stoking tension in the region through its military patrols, and of taking sides in the dispute.
The United States has sought to assert its right to freedom of navigation in the South China Sea with its patrols and denies taking sides in the territorial disputes.
Russia has been a strong backer of China’s stance on the arbitration case, that was brought by the Philippines.
Yang said China and Russia were comprehensive strategic partners and had already held many exercises this year.
“These drills deepen mutual trust and expand cooperation, raise the ability to jointly deal with security threats, and benefit the maintenance of regional and global peace and stability,” he said.