Selina,
Nice to get to know you today.
As Jinqiao project is kind of complicated and still under discussion, I hereby only provide some docs about Nanxiang Taimao which I reckon exemplarily informative. I think the renovation cost of Jinqiao may be about one third of that of Nanxiang.
Attached please check the chart of comparison between before and after the renovation of Nanxiang Taimao and other auxiliary documents.
Yours cordially,
Zhou Qi