The practice involved the firing of "various missiles, dozens of torpedoes and hundreds of shells", the official Xinhua news agency said in a dispatch from the eastern city of Qingdao, home of China's North Sea Fleet which participated in the exercise.
Citing a military statement, Xinhua said that the firing was for intercepting "water-surface, underwater and airborne targets", adding that the exercise marked the first time a "maritime missile combat supply exercise" had been carried out.
The defence ministry said in January that military training this year would focus on "improving fighting capacity" to win "local wars", as Beijing is embroiled in several maritime territorial disputes with neighbouring countries.
In May, China's State Council, or cabinet, said in a white paper that the country would project its military power further beyond its sea borders and more assertively in the air.
China has rapidly expanded its navy in recent years, commissioning its first aircraft carrier in 2012 and adding to its submarine and surface fleets.
