U.S. rejects China's resource claims in South China Sea

China claims 90% of the potentially energy-rich South China Sea, but Brunei, Malaysia, the Philippines, Taiwan and Vietnam also lay claim to parts of it, through which about $3 trillion of trade passes each year. Beijing has built bases atop atolls in the region but says its intentions are peaceful.

Beijing routinely outlines the scope of its claims with reference to the so-called nine-dashed line that encompasses about nine-tenths of the 3.5-million-square-kilometer South China Sea on Chinese maps.

“This is basically the first time we have called it illegitimate,” said Chris Johnson, an analyst with the Center for Strategic and International Studies. It’s “fine to put out a statement, but what you going to do about it?”