This article analyzes the instrumentalization of “China” in contacts between the Ming and Qing dynasties and Siam-Ayutthaya. It focuses both on the state-to-state relations and those between various members of the Siamese and the imperial societies. “China” and “Chinese-ness” stood for forms of ascribed identity within the Sinocentric world, for a form of social distinction, and for one of many identities assumed in the games of political loyalty. For the Ming and Qing empires, inclusion of a foreign land within “China” was conducted through the ritual and administrative fictions that situated Ayutthaya within a hierarchy vis-à-vis the imperial capital. Beyond the state's discourses, participation in a vaguely defined Chinese culture were means of building social networks within the merchant and official communities in Ayutthaya. For the junkmen that connected Ayutthaya and South China, multiple Chinese identities were instrumentalized and inflected according to the needs and necessities of the moment.