You are right. I did not involve in the Erdos project from the very beginning.
My first visit to Erdos was Oct of 2008 when the residents have lost their patience almost caused by the bad smell of the toilet in the harsh winter.
Then, Arno allowed me to install some Villa 9000 toilets for a few households. At the beiginning, few people would like to try it.
At last, we installed 4 toilets in one stairwell. The users are quite happy with the performance, no bad smell, no mechanical failure, no interference from the kitchen fan..proving the system is perfekt.
It was a pity the government insisted to replace it with normal flush toilets even if I promised to take care of the four household toilets at my own cost.
The authorities are still against dry toilets in China.