Combining a historical approach of Chineseness and a contemporary perspective on the social construction of Chineseness, this book provides comparative insights to understand the contingent complexities of ethnic and social formations in both China and among the Chinese diaspora in Southeast Asia. This book focuses on the experiences and practices of these people, who as mobile agents are free to embrace or reject being defined as Chinese by moving across borders and reinterpreting their own histories. By historicizing the notion of Chineseness at local, regional, and global levels, the book examines intersections of authenticity, authority, culture, identity, media, power, and international relations that support or undermine different instances of Chineseness and its representations. It seeks to rescue the present from the past by presenting case studies of contingent encounters that produce the ideas, practices, and identities that become the categories nations need to justify their existence. The dynamic, fluid representations of Chineseness illustrate that it has never been an undifferentiated whole in both space and time. Through physical movements and inherited knowledge, agents of Chineseness have deployed various interpretive strategies to define and represent themselves vis-a-vis the local, regional, and global in their respective temporal experiences. This book will be relevant to students and scholars in Chinese studies and Asian studies more broadly, with a focus on identity politics, migration, popular culture, and international relations.