[img]http://d.yimg.com/a/p/ap/20100414/capt.f77eb637b2c647618df283158916926b-f77eb637b2c647618df283158916926b-0.jpg?x=130&y=97&q=85&sig=3Suhn2IQrUns2Sd3w80X1Q--[/img]AP - A series of strong earthquakes struck China's western Qinghai province Wednesday, killing at least 300 people, injuring thousands and burying many others under toppled houses in a mountainous rural area, officials and state media said.