A Chinese entrepreneur who took just 19 days to build a 57-storey tower says he has triggered a construction revolution. And his dreams soar far, far higher.

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Since the roof went on Mini Sky City on 17 February 2015, Zhang Yue's tower has attracted plenty of attention.

A YouTube video about the building has been watched three million times.

Newspapers in many countries have listed its eye-catching vital statistics: 19 atriums, office space for 4,000 people and 800 apartments, and of course the 19 days it took to build.

This last figure requires a slight caveat - the tower was built in two bursts: the first 20 storeys went up in a week in 2014, but red tape held up construction for a year, with the final 37 storeys completed in 12 working days in February.

For some, the speed of construction has raised a question. Can something built so fast really be safe?

In fact, Zhang says safety is the very reason he got into construction, seven years ago.

In May 2008, China was already gearing up for the big party that was to be the Beijing Olympics, when disaster struck.

A powerful earthquake hit Sichuan province, killing 90,000 and leaving almost five million homeless.

It was a national tragedy. Many Chinese people were appalled at how easily thousands of buildings collapsed.

The death toll among children particularly - killed during lessons as schools caved in on top of them - gave rise to much soul-searching.

“At that time, everyone was debating how to make safer buildings,” Zhang says.

The world is moving forward and its moving with speed..I am afraid if we don't get it right with Buhari this time, Nigeria would be too far behind to catch up with the rest of the world..

The beauty of "engineering"