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TOPSHOT - Blue paint cans, seen sandwiched in between a layer of concrete, is seen at the Wei-Kuan complex which collapsed in the 6.4 magnitude earthquake, in the southern Taiwanese city of Tainan on February 8, 2016. Four survivors on February 8 were pulled alive from the rubble of an apartment complex felled by an earthquake in Taiwan, as questions intensified over why the building collapsed. Images from the site showed metal cans and foam used inside the concrete framework of the building, raising questions over the safety of the construction. AFP PHOTO / Sam Yeh / AFP / SAM YEH (Photo credit should read SAM YEH/AFP/Getty Images)

TOPSHOT - Blue paint cans, seen sandwiched in between a layer of concrete, is seen at the Wei-Kuan complex which collapsed in the 6.4 magnitude earthquake, in the southern Taiwanese city of Tainan on February 8, 2016.  Four survivors on February 8 were pulled alive from the rubble of an apartment complex felled by an earthquake in Taiwan, as questions intensified over why the building collapsed. Images from the site showed metal cans and foam used inside the concrete framework of the building, raising questions over the safety of the construction.  AFP PHOTO / Sam Yeh / AFP / SAM YEH        (Photo credit should read SAM YEH/AFP/Getty Images)