Time Lapse of 15-Story Chinese Ark Hotel Building Built In 2 Days Time

To explain the video in detail: 

48 hours of construction time a building of this size a conventional approach would take anywhere from 
3 months to anything goes! is the accrued time of construction with extra 4 days to complete the whole building as whole! Chinese workers rest after 10pm everyday. As you may see on the left corner the clicker registers 46 hours as time to finish the main structural components, and another 90 hours to finish the building enclosure. 

For 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 extreme 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 outdoor 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

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