The photographs chart the daily rituals of 24 refuse collectors as they go about their business. Each picture captures the extraordinary combination of roles played out by the men and women - part scavenger, part collector and part cleaner. What is especially striking about the images is the clinical tidiness of the landscapes; it's as if the refuse collectors have picked up the last piece of rubbish each time with a furtive urgency to keep public spaces immaculate at all times. Set against the backdrops of Beijing and Shanghai there's a significant lack of deprivation to the characters and a profound sense of purpose to their business. As a collection the book offers an insight into China's rudimentary social services, which otherwise don't exist or go unchronicled.