In the biggest chinese megapolis as in the smallest provincial cities, one can find speciality hardware shops dedicated to selling products in a particular category. These stores are often located in the same district, grouped together, alongside other groups of specialty hardware stores. They are sometimes settled in such narrow and unusual spaces that owners have to find clever ways to design them without losing space. We can find there la large range of objects, like useless trinkets, raw materials, and household electrical parts. These small businesses reveal a consumption mode based on needs of self-construction and infinite repairing of objects.