NINGBO, Zhejiang -- The Chinese navy started a drill, which involved firing dozens of missiles and torpedoes, in the East China Sea Monday.

The drill is aimed at honing the assault "intensity, precision, stability and speed" of troops amid heavy electromagnetic influences, said a navy statement released Monday.

"An information technology-based war at sea is sudden, cruel and short, which requires fast transition to combat status, quick preparation and high assault efficiency," the statement said.

The drill involved naval aviation forces, including submarines, ships and coastguard troops.