Conflicts between urban street vendors and city regulators have become a common urban sight in Chinese cities today. This paper considers how visions of modern urban streets and sidewalks have helped to generate increasingly restrictive policies on street vending and spurred new forms of urban regulation and policing. While mostly an everyday routine of Chinese city life, the resulting vendor–chengguan conflicts dramatize state power in public and carry the latent danger of crowd violence in response. In particular, aggressive policing of highly visible city streets can at times produce a volatile “politics of the street” involving episodes of vendor resistance and even dramatic expressions of bystander solidarity which challenge these street-level expressions of state power.