Paramilitary policemen carry an injured resident on a stretcher after an earthquake hit Ludian county of Zhaotong, Yunnan province August 3, 2014. A magnitude 6.5 earthquake struck southwestern China on Sunday, killing at least 150 people in a remote mountainous area of Yunnan province, causing some buildings, including a school, to collapse, Xinhua News Agency reported. (Photo by Reuters/China Daily)

People evacuated after an earthquake hit Ludian county of Zhaotong, Yunnan province August 3, 2014. (Photo by Reuters/China Daily)

Rescuers carry an injured man after an earthquake hit Ludian county, Yunnan province August 4, 2014. (Photo by Reuters/China Daily)

Debris of collapsed houses are seen scattered along a street, after a deadly earthquake hit Longtoushan town on Sunday, in Ludian county, Zhaotong, Yunnan province August 4, 2014. (Photo by Reuters/China Daily)

People walk among debris after an earthquake hit Ludian county, Yunnan province August 3, 2014. (Photo by Reuters/China Daily)

A paramilitary policeman carries an elderly man on his back after an earthquake hit Ludian county of Zhaotong, Yunnan province August 3, 2014. (Photo by Reuters/China Daily)

People run past a hillside alley which is at risk of landslide after an earthquake hit Ludian county of Zhaotong, Yunnan province August 3, 2014. The magnitude 6.5 earthquake struck southwestern China on Sunday, killing at least 175 people and leaving more than 180 missing and 1,400 injured in the remote area of Yunnan province, causing thousands of buildings, including a school, to collapse, Xinhua News Agency reported. (Photo by Reuters/China Daily)

Paramilitary policemen carry an injured woman with a stretcher after an earthquake hit Ludian county of Zhaotong, Yunnan province August 3, 2014. (Photo by Reuters/China Daily)

Yang Hongshun, 9, is seen at a hospital after he was injured in an earthquake in Ludian county of Zhaotong, Yunnan province August 3, 2014. (Photo by Wong Campion/Reuters)

A paramilitary policeman carries a baby in his arms after an earthquake hit Ludian county of Zhaotong, Yunnan province August 3, 2014. (Photo by Reuters/China Daily)

A child drinks milk from a bottle at a hospital after being injured in an earthquake in Ludian county of Zhaotong, Yunnan province August 3, 2014. (Photo by Wong Campion/Reuters)

A man holds a picture as he stands among debris of collapsed buildings after an earthquake hit Longtoushan township of Ludian county, Yunnan province August 4, 2014. (Photo by Wong Campion/Reuters)

A helicopter flies above collapsed houses after a magnitude 6.3 earthquake hit Longtoushan town, Ludian county, Zhaotong, Yunnan province, August 4, 2014. (Photo by Reuters/Stringer)

Liu Jiali (front L) cries as his daughter (C) wipes his tear after an earthquake killed Liu's wife and two other children in Longtoushan township of Ludian county, Yunnan province August 4, 2014. A magnitude 6.3 earthquake struck southwestern China on Sunday, killing at least 398 people in a remote area of Yunnan province, and causing thousands of buildings, including a school, to collapse. (Photo by Wong Campion/Reuters)

Rescuers search for survivors as they walk among debris of collapsed buildings after an earthquake hit Longtoushan township of Ludian county, Yunnan province August 4, 2014. (Photo by Wong Campion/Reuters)

An injured man looks up as he walks next to debris after an earthquake hit Ludian county, Yunnan province August 4, 2014. A magnitude 6.5 earthquake struck southwestern China on Sunday, killing at least 398 people in a remote area of Yunnan province, and causing thousands of buildings, including a school, to collapse, Xinhua News Agency reported. (Photo by Reuters/China Daily)

Rescuers carry an injured man on a makeshift stretcher as they walk down the stairs of a bridge after an earthquake hit Ludian county, Yunnan province August 4, 2014. (Photo by Reuters/China Daily)

Chinese rescuers carry an injuried resident after an earthquake hit an area of Ludian county in Zhaotong in southwest China's Yunnan province on August 3, 2014. The quake in Zhaotong prefecture, in the province's northeast, toppled buildings and left residents frantically searching for survivors beneath the rubble, images on social media showed. (Photo by AFP Photo)