The Greenhouse consists of four main modules: 

1. Foundation 

2. Frame

3. Genderneutral toilet and urinal

4. Composting bags. 

Baixing Kindergarten, in the town of Yebu, is lacking water resources and sewage systems. The greenhouse outhouse provides the most befitting solution.

Gansu Province in western China has cold winters and hot summers. There is little rainfall in the eastern part but the loess is too porous to retain it. 

The greenhouse design was chosen to ensure a comfortable temperature during the winter to enable the composting of the human waste. Instead of flushing the toilet, dry natural materials are used to cover the waste to absorb the smell and promote the composting.