China's Belt and Road Initiative (BRI) evolved from promotion of Eurasian connectivity into a catchall for Chinese foreign policy and infrastructure investments worldwide. Although usually portrayed as a top-down geopolitical project of the Chinese central government, this article argues the BRI is actually shaped by converging and diverging interests of a wide variety of actors within and outside China. In order to conceptualize the relational, contingent, and unstable emergence of the BRI in Latin America, the article emphasizes the process of co-production as a theoretical framework. It first analyzes how the BRI incorporated Latin America through policy and discourse analysis, then examines the multi-scalar and multi-sited co-production of Chinese-funded port and railroad infrastructures through interviews and public documents in Brazil.