Here’s the original English-language source... no more information than the Mail article, unfortunately

http://www.xinhuanet.com/english/2018-01/23/c_136918319.htm

This doesn't take into account the planning, or the cost of construction.

how long was the length they put in, in 9 hours?

Such an awful article.... its missing so much useful and relevant information

I flagged this because the entire story is summed up in the title. Very low effort article, nothing to discuss. Typical Daily Mail garbage.

Are we really going to trust an article from the Daily Mail now? Not that I've read the article, I refuse to visit their site out of principle.