Rescuers carry the body of a victim at the Juyuan High School in Juyuan Town, Dujiangyan City, southwest China's Sichuan Province, May 13, 2008. Rescuers work against the rainy weather to search quake survivors on Tuesday. (Xinhua Photo)

A 13-storey ancient pagoda was broken with its upper part into rubbles, at Langzhong, southwest China's Sichuan Province, May 12, 2008. The effect of a 7.8-magnitude earthquake that hit Wenchuan County spread to the vast adjacent areas, leaving the communications partially severed and many buildings ruined. (Xinhua Photo)

Two wounded persons receive medical treatment outside the makeshift tents in Ningqiang County, north China's Shaanxi Province, on May 13, 2008. Preliminary statistics shows that five persons were killed and more than one hundred wounded in Ningqiang, a county neighbouring the earthquake-hit Sichuan Province.(Xinhua Photo)

Rescuers search for survivors at the Juyuan High School in Juyuan Town, Dujiangyan City, southwest China's Sichuan Province, May 13, 2008. Rescuers work against the rainy weather to search quake survivors on Tuesday. (Xinhua Photo)

Locals are evacuated from the earthquake-hit Beichuan County, southwest China's Sichuan Province, May 13, 2008. Beichuan County is badly damaged in Monday's quake, with great numbers of buildings collapsed. (Xinhua Photo)

Soldiers help a wounded survivor to safe place at the earthquake-hit Beichuan County, southwest China's Sichuan Province, May 13, 2008. Beichuan County is badly damaged in Monday's quake, with great numbers of buildings collapsed and landslides around the county. (Xinhua Photo)

Rescuers carry a wounded student out of the debris at Wudu Primary school in Hanwang Town, Mianzhu City, southwest China's Sichuan Province, May 13, 2008. Teachers and students of the school are buried, the aftermath of Monday's earthquake.(Xinhua Photo)

Blood donators wait for blood extraction in the compartment of a bloodmobile, at Nangchong, southwest China's Sichuan Province, May 13, 2008. The public of Nanchong City activelydonate blood to help victims of the quake that rocked the Sichuan Province with the epicenter at Wenchuan County on Monday. There is a large demand for blood in quake-hit areas and feedback from the quake-stricken areas shows blood and plasma products are urgently needed. (Xinhua Photo)

Soldiers of China's eighth peacekeeping team donate money for the earthquake-striken areas in southwest China's Sichuan Province, in Bukavu, the Democratic Republic of Congo (DRC), May 12, 2008. (Xinhua Photo)

Relief paratroops aboard a plane towards Mianyang, southwest China's Sichuan Province, on May 13, 2008. Chinese authorities have dispatched batches of relief troops to join in disaster relief efforts after a major earthquake jolted southwest China's Sichuan Province Monday afternoon. (Xinhua Photo)