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China's new island in the South China Sea

21 June 2015 Last updated at 01:04 BST

The news came faster than many expected - China says it will finish building some new islands in the South China Sea "within days".

The construction work has been carried out at a breakneck pace, to the alarm of the United States and many of China's neighbours, who have overlapping claims to the same waters.

From Beijing, Celia Hatton explains.