Residents queue to get life supplies at a temporary shelter site in Lushan county of Ya'an city, Southwest China's Sichuan Province, April 21, 2013. Several temporary shelter sites can be seen in Lushan county and the life supplies in these shelter sites are sufficient. A 7.0-magnitude earthquake jolted Lushan county on April 20 morning. Photo: Xinhua

Residents have breakfast at a temporary shelter site in Luyang Township of Lushan county in Ya'an city, Southwest China's Sichuan Province, April 21, 2013. Several temporary shelter sites can be seen in Lushan county and the life supplies in these shelter sites are sufficient. A 7.0-magnitude earthquake jolted Lushan county on April 20 morning. Photo: Xinhua

Resident Yang Xueping help her son to wear a mask at a temporary shelter site in Taiping Town of Lushan county in Ya'an city, Southwest China's Sichuan Province, April 21, 2013. Several temporary shelter sites can be seen in Lushan county and the life supplies in these shelter sites are sufficient. A 7.0-magnitude earthquake jolted Lushan county on April 20 morning. Photo: Xinhua

Children play outside a temporary shelter site in Lushan county of Ya'an city, Southwest China's Sichuan Province, April 21, 2013. Several temporary shelter sites can be seen in Lushan county and the life supplies in these shelter sites are sufficient. A 7.0-magnitude earthquake jolted Lushan county on April 20 morning. Photo: Xinhua

Resident Chen Dashuang (R) plays with her son in a tent at a temporary shelter site in Lushan county of Ya'an city, southwest China's Sichuan Province, April 21, 2013. Several temporary shelter sites can be seen in Lushan county and the life supplies in these shelter sites are sufficient. A 7.0-magnitude earthquake jolted Lushan county on April 20 morning. Photo: Xinhua