Rescuers unload medical materials from a helicopter in in Yingxiu Town of Wenchuan County, the epicenter of Monday's massive earthquake on May 14, 2008. (Xinhua Photo)

PLA soliders carry the relief supplies onto a cargo-aeronef heading for the earthquake-affected areas in Sichuan Province to drop the urgently-needed food and relief supplies, in Wuhan, central China's Hubei Province, May 13, 2008. China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people buried under rubble and mud. (Xinhua Photo)

(Xinhua News Agency May 15, 2008)