This study reports some findings from my RGC-funded project on transnational Christian networks originating in rural Wenzhou, Southeast China, and linking China to Europe. It recounts the dual process of how multidirectional international business migration contributes to the global spread of a highly indigenized Chinese Christianity and how transnational Chinese draw on Christian agency to recreate a territorial culture in diaspora. Specifically, I show how a group of Wenzhou migrants, mainly as merchants and traders, while being haunted by memories and realities of migrant illegality, have managed to bring their version of Christianity along with a household-based economy from their rural hometown to Paris, France, and established an institutional niche for their diasporic and religious practices. The ethnographic study examines structural convergences between their religious and business activities based on shared histories of marginalization and subjugation in the context of state-produced legality, and suggests that it is through the constant (re)negotiation of boundaries between market and non-market relations that members of this Chinese merchant diaspora are able to maintain their premodern communal solidarity and moral legitimacy in the global market economy.