A new set of naval drills between China and Russia are underway off the east coast of Russia. The drills themselves will include anti-submarine warfare activities. Xu Jinfeng says the drills will help keep them on their toes.

"We keep a constant alert of the waters through both observation equipment and direct sight. If we see any enemy frogmen approaching, we will defend ourselves with light weapons. " Joint beach landing and air defense drills will also take place.

This is the second naval exercise between China and Russia this year.The two sides conducted drills in the Mediterranean in May.