Abstract: The Jin family was originally a Korean family that resided in Yizhou, but they turned into one of the Manchu booi banners in the 17th century. In High Qing, Changming and Jinjian served as the Chiefs of the Department of Imperial Household in the inner court, while Jinjian’s sister, Lady Jin, was one of the Qianlong Emperor’s concubines. However, there were disputes revolving around Changming’s and Jinjian’s lineages, which vied for the right to inherit the supervisor of niru, the basic unit of the booi eight banners. Because the Jin family were originally Koreans, they still retained their Korean identity in a certain way. Both Changming or Jinjian disclosed their ethnic identity to Korean envoys by mentioning that their ancestors’ graves were still well-preserved in Yizhou. Furthermore, they both used their political influence to assist Korean envoys to negotiate diplomatic issues in the royal court and sometimes took their bribes. The story of the Jin family indicates the multi-facted nature of ethnic identity discourses that can be considered from the perspectives of emotions, political institution, and interests in reality.