Interior Space and Exhibition Design Qianjiang House Sales Center by By Design Qianjiang House is a sales center located in Hangzhou, China, covering 2000 square metres. The interior is fully assembled from prefabricated parts, and the recyclable construction supports a green and healthy concept. A Mobius strip, a symbol of the infinite cycle, is expressed as a visible visual form. Spiral pendant lamps recall a ribbon in motion within the large space. The negotiation area uses soft light colours, leather and silk fabric inspired by the Jiangnan oil-paper umbrella. Furniture is detachable and washable where possible, and the air purification system is closely controlled.