Doctors suture wound for soldier Gong Guangzeng in a temporary tent outside the Lushan People's Hospital in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake which hit Lushan County on April 20 morning damaged the Lushan People's Hospital and doctors had to erect temporary tents outside the hosptial to treat the injured people. (Xinhua/Chen Cheng)

Doctors from the Chengdu Military Region bandage up a foot for a wounded person in a temporary tent outside the Lushan People's Hospital in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake which hit Lushan County on April 20 morning damaged the Lushan People's Hospital and doctors had to erect temporary tents outside the hosptial to treat the injured people. (Xinhua/Li Jian)

Staff members of the Chongqing Emergency Medical Rescue Team debug telegraph facilities as they arrive at the Lushan People's Hospital to conduct relief work in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake which hit Lushan County on April 20 morning damaged the Lushan People's Hospital and doctors had to erect temporary tents outside the hosptial to treat the injured people. (Xinhua/Li Jian)

A nurse takes care of a two-day-old baby in a temporary tent outside the Lushan People's Hospital in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake which hit Lushan County on April 20 morning damaged the Lushan People's Hospital and doctors had to erect temporary tents outside the hosptial to treat the injured people. (Xinhua/Li Jian)

Doctors from the Chengdu Military Region treat a victim from Lingguan Township of the badly-hit Baoxing County in a temporary tent outside the Lushan People's Hospital in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake which hit Lushan County on April 20 morning damaged the Lushan People's Hospital and doctors had to erect temporary tents outside the hosptial to treat the injured people. (Xinhua/Li Jian)

Doctors and nurses pacify victims in a temporary tent outside the Lushan People's Hospital in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake which hit Lushan County on April 20 morning damaged the Lushan People's Hospital and doctors had to erect temporary tents outside the hosptial to treat the injured people. (Xinhua/Chen Cheng)

The injured 3-year-old girl Zheng Bin rests in her father's arms in a temporary tent outside the Lushan People's Hospital in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake which hit Lushan County on April 20 morning damaged the Lushan People's Hospital and doctors had to erect temporary tents outside the hosptial to treat the injured people. (Xinhua/Li Jian)

Two sons of citizen He Jian sleep on a tricycle beside Kangzang Road on the first night after the deadly earthquake in Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake jolted Lushan County of Ya'an City on April 20 morning. Many citizens chose to spend the first night after the quake on roads or in temporary tents. (Xinhua/Xing Guangli) 

People sleep in a tent on the first night after the deadly earthquake in Lushan County, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake jolted Lushan County of Ya'an City on April 20 morning. Many citizens chose to spend the first night after the quake on roads or in temporary tents. (Xinhua/Xiao Yijiu) 

Citizens rest beside a road on the first night after the deadly earthquake in Lushan County in Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake jolted Lushan County of Ya'an City on April 20 morning. Many citizens chose to spend the first night after the quake on roads or in temporary tents. (Xinhua/Luo Xiaoguang) 

A girl sleeps on a temporary bed beside a road on the first night after the deadly earthquake in Lushan County of Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake jolted Lushan County of Ya'an City on April 20 morning. Many citizens chose to spend the first night after the quake on roads or in temporary tents. (Xinhua/Xiao Yijiu) 

A man sleeps on a tricycle beside a road on the first night after a deadly earthquake in Lushan County, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake jolted Lushan County of Ya'an City on April 20 morning. Many citizens chose to spend the first night after the quake on roads or in temporary tents. (Xinhua/Xiao Yijiu) 

A woman rests beside a road on the first night after a deadly earthquake in Lushan County, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake jolted Lushan County of Ya'an City on April 20 morning. Many citizens chose to spend the first night after the quake on roads or in temporary tents. (Xinhua/Xiao Yijiu) 

Volunteers offer hot porridge to quake victims at the Lushan Stadium, a temporary shelter site, on the first night after the deadly earthquake in Lushan County in Ya'an City, southwest China's Sichuan Province, April 21, 2013. A 7.0-magnitude earthquake jolted Lushan County of Ya'an City on April 20 morning. Many citizens chose to spend the first night after the quake on roads or in temporary tents. (Xinhua/Chen Cheng)