Based on this insight, we created plastic umbrella bags with a picture of a bucket, cup or bowl on the bottom, and placed them in shopping malls all around Hong Kong. During rainy days, when rainwater was filling the umbrella bag up, this helped to convey our message that even a few drops of precious rainwater makes a thirst-quenching drink in Northwest China.

Passers-by used the bags on rainy days and a lot of them were kind enough to make donations. Some people even took a few to give to their friends and family to help spread the message. Donations increased enough to build more than 5,300 water cellars in 2009.