China has launched two Type 055 class guided missile destroyers at the Dalian Shipbuilding Industry in Liaoning province, according to Chinese media.

Water started to be pumped into the dry docks where the next-generation destroyers were built around 7 am before the docks' gates were opened, unnamed witnesses were quoted.

Pictures showed a small launch ceremony at the shipyard, with hundreds of workers standing in formation in front of the two destroyers, each decorated with a huge national flag, ceremonial banners and colourful streamers.

The warships were then pushed into open water by tugboats, pictures posted online show. China has now launched four Type 055 vessels; the first in June last year. They have yet to begin sea trials, the news daily reported.

The Type 055 has a full displacement of more than 10,000 metric tons and will be equipped with new types of air-defence, missile-defence, anti-ship and anti-submarine weapons, according to the Chinese Navy.

It has 112 vertical launching cells capable of firing various kinds of missiles, including China's long-range, land-attack cruise missile. Its firepower is believed to be double that of the Type 052D guided-missile destroyer, currently China's largest and most powerful surface combatant in service.