This seemingly trivial matter of going to the toilet is actually a concern for the civilization of society and human dignity. The majority of residents in the old city still rely on public toilets today in Beijing. However, although there are various problems with these public toilets, they are densely distributed and have proper water and sewage. Thus it is actually a good opportunity to solve the problem of clean water in the hutongs. The "Clean Station" uses the "void" occupied by the public toilets in the hutongs to fill the "need" for bodily dignity, and to awaken respect for the privacy and health of individuals.