This research study explores the emergence and development of reciprocal relationships within the car boot market in Guangzhou. Drawing upon the theoretical framework of Symbolic Interactionism, the motivation behind these relationships is examined. The study uses field research, including in-depth interviews and observations, to gather data on the motivations, interactions, and reciprocal exchanges among market participants. The research objectives include understanding the background and characteristics of the car boot market, exploring the establishment of reciprocal relationships from the perspective of Symbolic Interactionism, and investigating the implications of these relationships for social identities. The research methodology encompasses qualitative methods, such as participant observation and interviews, to provide a comprehensive understanding of the car boot market and its reciprocal dynamics. The research findings indicate that in the car boot market, reciprocal relationships are formed through the exchange of symbols and meaningful interactions among vendors and customers. These relationships contribute to the construction of social identities and foster economic development within the market. Through direct and indirect reciprocity, vendors build networks and expand their social identities beyond their existing relationships. The conclusions drawn from this study underscore the significance of interactional behaviors and symbolic exchanges in the car boot market. The research highlights the applicability of Symbolic Interactionism in analyzing and understanding the nuanced dynamics of reciprocal relationships within informal economies. It offers valuable insights for the development and management of the car boot market and recommends strategies for fostering and sustaining reciprocal relationships.