Chinese state media reports Sky City does not have necessary permits to start construction . Sky City , developed by Broad Group , is to be world 's tallest building at 838 meters . He added that they have evidence to show no laws have been broken . Broad Group to CNN : ' We have not yet started work ' Broad Group will use pre - fabricated steel - concrete blocks to build Sky City by December 2014 .
Chinese state media reports Sky City does not have necessary permits to start construction . Sky City , developed by Broad Group , is to be world 's tallest building at 838 meters . Broad Group to CNN : ' We have not yet started work ' Broad Group will use pre - fabricated steel - concrete blocks to build Sky City by December 2014 .