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See them all. This compiled video has covered three time-lapse events in which 3 separate buildings were built in record-breaking time by a Chinese private conglomerate -Broad Group. 30 storey building built in 15 days 15 floor building in 7 days 6 floor building in 1 day For more information, please visit www.broad.com. 1988--1992: The early years Zhang Yue founded Broad in 1988, registering in Chenzhou, Hunan. Using $3000, Broad developed industrial boilers based on Zhang's patented design.At the time, most boilers domestically manufactured were of poor quality and had high risk of exploding, while Broad's did not. 1992--2005: Move to Changsha and rise In 1992, the company was moved to Changsha and began manufacturing absorption chillers. At the time, government provided incentives for non-electric chillers to relief strain on the national electricity grid, contributing to the company's rise as it became the global leader in absorption chiller by sales in 1996; it entered the international market in 1998 and today, its sales in domestic and international markets split evenly. 2005-Present: From manufacturing to sustainable construction While absorption chillers remain Broad's largest source of revenue, it now offers other environmentally friendly products including air purifiers and air conditioner terminals, with the BSB(Broad Sustainable Building) its latest invention in sustainable building technology, receiving more attention. Invented in 2009, the BSB achieves high energy efficiency and carbon reduction primarily through thermal insulation, preventing cool air from leaving indoors and hot air from coming in from outdoors when the weather is hot and vice versa when the weather is cold, and requires short construction time since parts are pre-fabricated in factories and assembled onsite.In the 2010 United Nations Climate Change Conference, President of Mexico, Felipe Calderón, commented the BSB technology to be a practical, imaginative, creative & bold endeavor and a new revolution of world's architectural and housing industry, which is bound to be transferred to developing countries leading to reduction in carbon emissions. BSB has also been tested to be able to resist a 9.0 magnitude earthquake and was recommended in an United Nations Environment Program report on the rebuilding of Sichuan after its catastrophic earthquake in 2008. So far, Broad has built 4 demos of BSB, including: the 6-story Broad Pavilion in Shanghai Expo 2010 in 1 day, the 14-story New Ark's Hotel in Broad's headquarters in 6 days, the Broad Pavilion in 2010 United Nations Climate Change Conference in 8 days and a 30-story hotel prototype near Dongting lake in 15 days. Level 9 Earthquake Resistance: diagonal bracing structure, light weight, steel construction, passed level 9 earthquake resistance testing 6x Less Material: even though the construction materials are much lighter(250kg/m2) than the traditional materials(over 1500kg/m2), the floors and walls are solid with surefootedness, airtight and sound-proofing 5x Energy Efficient: 150mm thermal insulation for walls and roofs, triple glazed plastic windows, external solar shading, heat insulation, fresh air heat recovery, LED lighting, yearly HAVC A/C energy consumption equivalent to 7 liters oil. 20x Purification: after 3 levels of purification, the purification efficiency for fresh air reaches 95%-99.9%; air exchanged 1-2.5 times per hour, and indoor air is 20x cleaner than out door air 1% Construction Waste: all components are factory made, construction waste, mainly package materials, result from on site set-up only and amount to 1% of the total weight of the building. This is the first building in human history which combines almost all environmental friendly, comfortable and secure elements. So, we call it Sustainable Building.