Broad Group's Sky City Supertall Tower J220 two hundred floor 838m Masterplan The masterplan of the Changsha Sky City J220 with Broad Group's factory Fujian United Benefit Broad Sustainable Building Technology Fujian United Benefit Broad Sustainable Building Technology Co., Ltd. has been developed by both UBG and Changsha Broad Sustainable Building Technology Co., Ltd. The project is planned to be constructed in Fuan on November 30, 2011, and cover an area of 1.3 million square meters. In November 2010, both UBG and Broad Group have reached an agreement and officially signed the papers in March 2011. After half a year of preparation, the world’s second production base of sustainable building technology has been developed. Comfortable, safe, healthy, durable, energy efficient, less material waste, recyclable materials, versatile, and centralized are just some of the advantages of sustainable technology. The newly developed steel structure has been praise...