This paper examines the labor rights situation at Chinese-owned construction sites in Sihanoukville, a city on the Cambodian coast that in recent years has been described as embodying the worst excesses of Chinese foreign investment. Based on extensive interviews with Chinese and Cambodian workers, this paper argues that while Chinese-owned construction sites in Cambodia are grounded in a labor regime as exploitative as those in mainland China, workers’ agency in the former case is further undermined by their employers’ adoption of a policy of labor force dualism that draws boundaries between Chinese and Cambodian workers.