Ling Guifang (L), a vender selling cooked meat, runs her business next to a public shelter in Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Jin Liwang)

Displaced villagers cook meals in Gucheng Village, Longmen Town, Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Jin Liwang)

Han Wenyang, a pregnant woman, rests in a tent with her niece in Taiping Town, Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Jiang Hongjing)

Displaced villagers have a meal together in Gucheng Village, Longmen Town, Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Jin Liwang)

A mother holds her kid and falls asleep in a shelter in Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Jiang Hongjing)

Yang Mingbo, a displaced resident, sits in a makeshift tent in Taiping Town, Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Jiang Hongjing)

People carries an injured woman in the People's Hospital in the quake-hit Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Li Hualiang)

An injured person is transported to a hospital in the quake-hit Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/He Junchang)

A surgeon carries an injured man on his back to the place for x-ray in the People's Hospital in the quake-hit Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/He Junchang)

An injured person is transported to a hospital in the quake-hit Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/He Junchang)

A nurse takes care of an injured boy in the People's Hospital in the quake-hit Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/Li Hualiang)

Soldiers and volunteers carry an injured person to the hospital in the Longmen Township, Lushan County, southwest China's Sichuan Province, April 21, 2013. Military and civilian rescue teams are struggling to reach every household in Lushan and neighboring counties of southwest China's Sichuan Province, badly hit by Saturday's strong earthquake. (Xinhua/He Junchang)