Chinese state media reports Sky City 's does not have required permits to start construction . For its part Broad Group insisted everything was above board . Sky City , developed by Broad Group , planned to be world 's tallest building at 136 mu . CNN to CNN : ' We have not yet started work ' Broad Group will use pre-fabricated steel-concrete blocks to build Sky City by the year .
Chinese state media reports Sky City 's does not have required permits to start construction . Sky City , developed by Broad Group , planned to be world 's tallest building at 136 mu . CNN to CNN : 'We have not yet started work ' Broad Group will use pre-fabricated steel-concrete blocks to build Sky City by the year .