A firefighter works at the site where a building collapsed, in Shanghai, China May 16, 2019. Five people were killed when a building undergoing renovation collapsed in China's financial hub of Shanghai on Thursday, though 14 people were pulled from the rubble alive by rescuers. REUTERS/Aly Song

Firefighters work at the site where a building collapsed, in Shanghai, China May 16, 2019. The building in Shanghai's Changning district collapsed late in the morning, trapping some 20 people inside, the city government said in a statement. It did not say why the building collapsed. REUTERS/Aly Song

Firefighters work at the site where a building collapsed, in Shanghai, China May 16, 2019. Five people were killed when a building undergoing renovation collapsed in China's financial hub of Shanghai on Thursday, though 14 people were pulled from the rubble alive by rescuers. REUTERS/Aly Song

Firefighters carry a casualty on a stretcher at the site where a building collapsed, in Shanghai, China May 16, 2019. The building in Shanghai's Changning district collapsed late in the morning, trapping some 20 people inside, the city government said in a statement. It did not say why the building collapsed. REUTERS/Aly Song

Firefighters carry a casualty on a stretcher at the site where a building collapsed, in Shanghai, China May 16, 2019. Five people were killed when a building undergoing renovation collapsed in China's financial hub of Shanghai on Thursday, though 14 people were pulled from the rubble alive by rescuers. REUTERS/Aly Song

Firefighters work at the site where a building collapsed, in Shanghai, China May 16, 2019. The building in Shanghai's Changning district collapsed late in the morning, trapping some 20 people inside, the city government said in a statement. It did not say why the building collapsed. REUTERS/Aly Song