Staff members of the Liaison Office of the Central People' s Government in Macao Special Administrative Region (SAR) mourn during a silent tribute in Macao, south China, 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 Photo/He Zili)

Citizens and tourists mourn during a silent tribute in Hong Kong, south China, May 19, 2008. (Xinhua Photo/Liu Lianfen)

Citizens mourn during a silent tribute at a commercial walking street in Changsha, capital of central south China's Hunan Province, May 19, 2008. (Xinhua Photo/Long Hongtao)

Students and teachers of the Institute of Islamic Theology mourn during a silent tribute in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region, May 19, 2008.  (Xinhua/Liu Quanlong)

Tens of thousands of citizens mourn during a silent tribute at Xinning Square in Xining, capital of northwest China's Qinghai Province, May 19, 2008.(Xinhua Photo/Hou Deqiang)

Residents observe a three-minute silence for the quake victims, in Wuhu, east China's Anhui Province, May 19, 2008. (Xinhua Photo/Chen Lixi)

Residents observe a three-minute silence for the quake victims, in Tianjin, north China, May 19, 2008.(Xinhua Photo)

Taxi drivers observe a three-minute silence for the quake victims, at the Xiyuan Square in Chaohu, east China's Anhui Province, May 19, 2008. (Xinhua Photo/Zhang Shenghao)

Power workers observe a three-minute silence for the quake victims, in Huaibei, east China's Anhui Province, May 19, 2008. (Xinhua Photo/Wang Wen)

Duan Jinsheng (L), 83, and Cai Xiaoyu (R), a student of Renmin University, mourn during a silent tribute in Tian'anmen Square in central Beijing, capital of China, May 19, 2008.(Xinhua Photo/Wang Qingqin)

A foreign tourist mourns with local citizens during a silent tribute in Lhasa, capital of southwest China's Tibet Autonomous Region, May 19, 2008. (Xinhua Photo/Gaesang Dawa)

People mourn during a silent tribute in Beijing, capital of China, May 19, 2008. (Xinhua Photo/Shen Hong)

Citizens gather to attend a silent tribute to the earthquake victims in Changsha, capital of central south China's Hunan Province, May 19, 2008. (Xinhua Photo/Long Haotong)

Teachers and students of Nanjin Normal University mourn during a silent tribute in Nanjing, capital of east China's Jiangsu Province, May 19, 2008.(Xinhua Photo/Chen Qi)

People mourn during a silent tribute in Lhasa, capital of southwest China's Tibet Autonomous Region, May 19, 2008. (Xinhua Photo/Gaesang Dawa)

A woman mourns while cuddling her baby during a silent tribute in Guiyang, capital of southwest China's Guizhou Province, May 19, 2008. (Xinhua Photo/Yang Junjiang)