Empirical evidence concerning the demographics and development of Chinese nationalism is sparse but important for scholarship and policy. Its collection entails methodological challenges in access and reliability. We conducted a field experiment to measure nationalism in incentive-compatible choices among a diverse group of 447 Chinese subjects in a field setting. Our results demonstrate greater nationalism in female, older, less affluent and more rural respondents. We also find support for nationalism in professional and educated individuals. Our results provide qualified support for a middle-class nationalism in China.