The book explains why paradiplomacy matters not only in the ‘low politics’ of economic and cultural cooperation, but also in the ‘high politics’ of diplomatic recognition. Presenting case studies of US states and cities developing policies towards divided China that paralleled, clashed or aligned with those pursued by federal agencies, it also identifies Chinese and Taiwanese objectives and strategies deployed when competing for US subnational ties. Conceptually, the book builds upon Constructivism, redefining paradiplomacy as an institutional fact, reflective of subnational identities and interests, rather than as a subnational pursuit of foreign markets, driven by objective economic forces. Featuring new empirical evidence and a novel conceptual framework for paradiplomacy, The United States’ Subnational Relations with Divided China will be a useful resource for students and scholars of US foreign policy, the politics of China and Taiwan, paradiplomacy and international relations.