https://www.nextbigfuture.com/2013/04/shanghai-tower-construction-continues.html
Rumors of salt in concrete sand in Shenzhen buildings | NextBigFuture.com
Apr 7, 2017 - In September 2011, it was reported there were concerns of an increase in steel thinning across China. Zhengzhou and Shaanxi Province were two of the regions
concrete sandshenzhen buildingsrumorssalt
https://commons.wikimedia.org/wiki/Category:Buildings_in_Shenzhen
Category:Buildings in Shenzhen - Wikimedia Commons
in shenzhencategorybuildingswikimediacommons