China has commissioned its latest aircraft carrier after extensive sea trials, adding a ship that experts say will help what is already the world's largest navy expand its power farther beyond its own waters.

The official Xinhua news agency said the Fujian had been commissioned on Wednesday at a naval base on southern China's Hainan island in a ceremony attended by President Xi Jinping.

The Fujian is China's third carrier and the first that it both designed and built itself.

It is perhaps the most visible example so far of Xi's massive military overhaul and expansion that aims to have a modernised force by 2035 and one that is "world class" by mid century — which most take to mean capable of going toe-to-toe with the United States.

With it, Beijing takes another step toward closing the

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