Students lower their heads during a silent tribute to the victims of the Lushan earthquake on April 20 at Lushan Middle School, Ya'an city, Southwest China's Sichuan province on April 27, 2013. A public mourning ceremony was held Saturday in Southwest China's Sichuan province for those who died in the 7.0-magnitude quake a week ago. The quake claimed nearly 200 lives and destroyed about 126,000 homes, according to official figures. [Photo/Xinhua]