Chinese submarines cruise South China Sea(2)

Upon its arrival at the predetermined sea area, the submarine started the drill of laying underwater mines. In recent years, the flotilla has completed actual-troop live-ammunition drills on such subjects as underwater torpedo salvo, underwater over-the-horizon missile attack, underwater concealed mining and blockade and great depth navigation, and joint military exercises on such important subjects as joint attack and joint blockade in cooperation with surface ships and aviation force.