This study seeks to understand how consumers make unethical decisions and how unethical consumer behavior is formed in a relational society. By taking a relational interactive perspective and adopting a grounded theory approach, we have developed a theoretical framework for examining UCB’s developmental process in a relational society. The framework reveals 4 levels and 12 paths of UCB formation. Importantly, this study finds that UCB in a relational society is influenced by guanxi-oriented social culture so deeply that it cannot be (...) considered the result of a purely individual behavior choice. (shrink)