China, the Philippines, Vietnam, Malaysia, Brunei and Taiwan all have claims over the area, and tensions often threaten to boil over
The South China Sea is one of the most strategically and economically important waterways in the world. In 2016 more than 21% of global trade was estimated by UN bodies to have transited through it, and it contains extensive oil and gas reserves.
But it is highly contested. China, the Philippines, Vietnam, Malaysia, Brunei and Taiwan all have claims over areas within the 3.5m sq km area, many of which overlap. Brunei is the only party that does not lay claim over any disputed islands, but it does say part of the sea falls within its exclusive economic zone.
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