The gunpowder-on-paper work was created on September 25, 2013 for Christie’s inaugural Shanghai auction, where it will be sold for charity.

https://jingdaily.com/cai-guo-qiang-kicks-off-christies-shanghai-with-a-bang-literally/
The gunpowder-on-paper work was created on September 25, 2013 for Christie’s inaugural Shanghai auction, where it will be sold for charity.