A man (front) whose waist is injured in the earthquake receives medical treatment at a medical post in Lushan County of Ya'an City, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Nearly 30 people were killed and 400 others injured in the earthquake, said Xu Mengjia, secretary of the Ya'an Municipal Committee of the Communist Party of China. Rescue team has been dispatched to the quake-affected area. (Xinhua/Wu Dan)

Injured people receive medical treatment at the Renmin Hospital of Lushan County in Ya'an City, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Nearly 30 people were killed and at least 400 injured in the earthquake, said Xu Mengjia, secretary of the Ya'an Municipal Committee of the Communist Party of China. Rescue teams have been dispatched to the quake-affected areas. (Xinhua/Wu Dan)

An injured man receives medical treatment at the Renmin Hospital of Lushan County in Ya'an City, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Nearly 30 people were killed and at least 400 injured in the earthquake, said Xu Mengjia, secretary of the Ya'an Municipal Committee of the Communist Party of China. Rescue teams have been dispatched to the quake-affected areas. (Xinhua/Jiang Hongjing)

Injured people receive medical treatment at the People's Hospital in Lushan County, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Forty-seven people were dead so far and at least 400 others injured in the earthquake. (Xinhua/Jiang Hongjing)

 An injured child receives medical treatment at the People's Hospital in Lushan County, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Forty-seven people were dead so far and at least 400 others injured in the earthquake. (Xinhua/Jiang Hongjing)

An injured man receives medical treatment at the People's Hospital in Lushan County, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Forty-seven people were dead so far and at least 400 others injured in the earthquake. (Xinhua/Jiang Hongjing) 

An injured woman receives medical treatment at the People's Hospital in Lushan County, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Forty-seven people were dead so far and at least 400 others injured in the earthquake. (Xinhua/Jiang Hongjing)

An injured receives medical treatment at the People's Hospital in Lushan County, Southwest China's Sichuan Province, April 20, 2013. A 7.0-magnitude earthquake hit Sichuan Province's Lushan County of Ya'an City Saturday morning. Forty-seven people were dead so far and at least 400 others injured in the earthquake. (Xinhua/Jiang Hongjing)

Injured people receive medical treatment at the People's Hospital in Lushan County of Ya'an City, Southwest China's Sichuan Province, April 20, 2013. The death toll rises to 46 in the 7.0-magnitude earthquake hitting Lushan County Saturday morning. (Xinhua/Jiang Hongjing)

Injured people receive medical treatment at the People's Hospital in Lushan County of Ya'an City, Southwest China's Sichuan Province, April 20, 2013. The death toll rises to 46 in the 7.0-magnitude earthquake hitting Lushan County Saturday morning. (Xinhua/Jiang Hongjing)

An injured woman receive medical treatment at the People's Hospital in Lushan County of Ya'an City, Southwest China's Sichuan Province, April 20, 2013. The death toll rises to 46 in the 7.0-magnitude earthquake hitting Lushan County Saturday morning. (Xinhua/Jiang Hongjing)

An injured man receive medical treatment at the People's Hospital in Lushan County of Ya'an City, Southwest China's Sichuan Province, April 20, 2013. The death toll rises to 46 in the 7.0-magnitude earthquake hitting Lushan County Saturday morning. (Xinhua/Jiang Hongjing)

An injured person is carried onto an ambulance in Lushan County of Ya'an city, Southwest China's Sichuan Province, April 20, 2013. The death toll rises to 46 in the 7.0-magnitude earthquake hitting Lushan County Saturday morning. (Xinhua/Jiang Hongjing)

Injured people receive medical treatment at the People's Hospital in Lushan County of Ya'an City, Southwest China's Sichuan Province, April 20, 2013. The death toll rises to 46 in the 7.0-magnitude earthquake hitting Lushan County Saturday morning. (Xinhua/Jiang Hongjing)

An injured woman receives medical treatment at the People's Hospital in Lushan County of Ya'an City, Southwest China's Sichuan Province, April 20, 2013. The death toll rises to 46 in the 7.0-magnitude earthquake hitting Lushan County Saturday morning. (Xinhua/Jiang Hongjing)