US President George W. Bush (L) and his wife Laura Bush stand in a silent tribute to China's earthquake victims at the Chinese Embassy in Washington May 20, 2008. Bush came to the Chinese Embassy on May 20 to mourn Chinese quake victims. (Xinhua)

US President George W. Bush (L) leaves words on the book of condolence as his wife Laura Bush (C) and Chinese Ambassador to the US Zhou Wenzhong look on at the Chinese Embassy in Washington May 20, 2008. Bush came to the Chinese Embassy on May 20 to mourn Chinese quake victims. (Xinhua)

US Senator Daniel Inouye attends mourning ceremony after signing on the book of condolence during a mourning ceremony held at the Chinese Embassy in Washington. DC, United States, on May 20, 2008. Staffers of the Embassy, local Chinese and overseas Chinese and some US officers attended the mourning ceremony on Tuesday for the victims of the 8.0-magnitude quake on Richter scale hitting southwest and northwest China's regions on May 12. (Xinhua)

Chinese Ambassadress to Britain Fu Ying (R) shows photos about earthquake in China to British Prime Minister Gordon Brown at the Chinese Embassy in London, capital of Britain, May 20, 2008. Brown came to the Chinese Embassy on May 20 to offer condolences to Chinese quake victims. (Xinhua)

Peruvian President Alan Garcia (3rd L) mourns for China's earthquake victims as Chinese Ambassador Gao Zhengyue (2nd L) stands aside at the Chinese Embassy in Lima, capital of Peru, May 19, 2008. Garcia came to the Chinese Embassy on May 19 to offer condolences to Chinese quake victims. (Xinhua)