China is reclaiming land at breakneck speed at Antelope Reef, satellite imagery shows, a move that analysts say could further strengthen Beijing's ability to project power in the South China Sea. Beijing asserts sovereignty over most of the South China Sea , through which more than one-fifth of global maritime trade flows each year. This puts the country at odds with the overlapping claims of several neighbors. One of these is Vietnam . Chinese forces wrested control of the Paracel Islands from