Zhang Yue, seventh right on the stage, founder and chairman of Broad Group, and Chinese officials attend the groundbreaking ceremony of the worlds tallest building Sky City in Changsha city, central Chinas Hunan province, 20 July 2013. China has embarked on the construction of an 838-meter-tall building in Changsha that is billed as the worlds tallest. Developer Broad Group on Saturday (20 July 2013) held a ground-breaking ceremony in the capital city of central province Hunan to start building the 208-storey tower, the Xiaoxiang Morning Herald newspaper reported on Sunday. Upon completion, the building would be about 10 meters taller than the Burj Khalifa in Dubai, currently the worlds tallest. The Changsha project, carried out by China Construction 5th Engineering Division Corp. Ltd. of CSCEC (China State Construction Engineering Corporation), is expected to be completed in April 2014, said Zhang Yue, founder and chairman of Broad Group. It was slated to open in May or June next year. The skycraper will contain a total area of 1.05 million square meters and will cost a whopping 5.2 billion yuan (US$847 million) to build, government-run news portal voc.com.cn reported.