A Chinese Company Plans to Build World's Tallest Skyscraper - in just THREE MONTHS

A construction company recently brought to light  a proposal to built the world tallest skyscraper within the interval of just three months.
Sky City in Changsha, south-east China, will be a 220-storey structure standing at an incredible 2,749ft (838m).They are to employ 3000 workers for  the job

This astonishing pace, which will see five storeys go up a day, is down to the revolutionary method of prefabricated building where blocks are built off site and slotted together to save time.

The half-mile high superstructure will be 32ft taller than the Burj Khalifa in Dubai - the current tallest building - and is expected to cost almost half as much.

It will have more than 5,000 residential properties, inclusive is 17,400 residents as well as a hotel for 1,000, a hospital, five schools and office space with overall capacity standing at 31,000.
Sky City is expected to cost around £400 million, significantly less than the £940 million Burj Khalifa which took more than five-years to build.
Once the company(Broad) get approval from Chinese government,the building is meant to commence towards the end of December and be completed by april 2013.
 How do you feel about this? Could anything possibly go wrong?