Rescuers mourn during a silent tribute on the debris of a collapsed middle school building in Beichuan County, southwest China's Sichuan Province, May 19, 2008. China began on May 19 a three-day mourning for the victims of the 8.0-magnitude quake hitting southwest and northwest China on May 12. (Xinhua/Li Tao)

Rescuers mourn during a silent tribute at a square in Hanwang town of Mianzhu in the quake-hit Sichuan Province, southwest China, May 19, 2008. (Xinhua Photo/Wang Jianhua)

Quake survivors of Beichuan Middle School mourn during a silent tribute in Mianyang, southwest China's Sichuan Province, May 19, 2008. (Xinhua Photo/Zhao Yinquan)

Peng Hao (R), who lost his father in the earthquake, mourns with his aunt during a silent tribute in Suishui town of Anxian county, southwest China's Sichuan Province, May 19, 2008. (Xinhua Photo/Yang Shiyao)

A worker of Sichuan Dongfang Steam Turbine Plant mourns during a silent tribute in Hanwang town of Mianzhu in the quake-hit Sichuan Province, southwest China, May 19, 2008. (Xinhua Photo)

Rescuers mourn during a silent tribute at a square in Hanwang town of Mianzhu in the quake-hit Sichuan Province, southwest China, May 19, 2008. (Xinhua Photo/Wang Jianhua)

Employees of a hotel mourn during a silent tribute in Mianzhu, the quake-hit southwest China's Sichuan Province, May 19, 2008.(Xinhua Photo)