Donald Tsang Yam-kuen (C, Front), chief executive of the HKSAR and other officials mourn during a suspension at the government headquarterse in Hong Kong, south China, May 19, 2008. (Xinhua)

Employees of different ethnic groups mourn during a silent tribute to the people killed in the earthquake, in Beijing, capital of China, May 19, 2008. (Xinhua)

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)

Soldiers of frontier defence mourn during a silent tribute in Qingdao, east China's Shandong Province, May 19, 2008. (Xinhua)

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)