Wanning Sun explores a number of paradoxes that the domestic worker lives out on a daily basis: her ubiquitous invisibility, her enduring transience, and her status as an intimate stranger. Collectively, these paradoxes afford her a unique window onto the spaces and practices of the modern Chinese city. This intimate stranger’s epistemological status makes her an unauthorized yet authoritative witness of urban residents’ social lives, offering a revealing lens through which to examine both the formation of new social relations in post-reform urban China, and the new social uses of space—both domestic and public—engendered by these relations.