China's first aircraft carrier has entered into service, the defence ministry says.
The 300m (990ft) Liaoning - named after the province where it was refitted - is a refurbished Soviet ship purchased from Ukraine.
For now the carrier has no operational aircraft and will be used for training.
But China says the vessel, which has undergone extensive sea trials, will increase its capacity to defend state interests.
China's Premier Wen Jiabao said the ship would have "a mighty and deep significance". It would be "a cause for patriotic passion", he said at a ceremony attended by top Chinese leaders at Dalian Port.
The delivery of the aircraft carrier comes at a time when Japan and other countries in the region have expressed concern at China's growing naval strength.
China and Japan are embroiled in a row over disputed islands in the East China Sea.
Several South-east Asian nations are also at odds with China over overlapping territorial claims in the South China Sea.
It also comes weeks ahead of a party congress expected to see the transition of power to a new generation of Chinese leaders.
Source: http://www.bbc.co.uk/news/world-asia-china-19710040
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