The question of what constitutes backpacker identity has been one of the central topics of backpacking tourism research. With the economic boom in China, the last two decades witnessed the proliferation of Chinese backpackers. By adopting quantitative methods, this study provides a comprehensive understanding of what makes one a "backpacker" in China. Comparing results from t-tests, binomial logistic regression, and multiple linear regression, it is found that Chinese backpackers' social identities are mostly associated with external-oriented motivation, work alienation, and detachment from home centers. Behavioral characteristics, which have up until now been widely used to define backpackers, have very limited relationship to their identities in China. This finding calls for future research to rethink what is a backpacker. The research makes an important contribution to the understanding of this growing market and its particular identity factors.