This paper traces the history of a Korean family in the Manchu banner system, discussing the ways that Korean subjects came to achieve power and privilege in Qing society. The Jin family originally came from Ŭiju, a Korean border city near the Yalu River, and became a member of the Manchu banner organization in the early seventeenth-century. As bondservants who were supposed to serve the imperial court, this Korean family became very close to the Qing emperors. As members of the Three Upper Banners, which belonged to the Qing emperor, the Jin family had the chance to raise their political and social status. Two descendants of the Jin family reached very prominent positions, with one becoming Chief of the Imperial Household Department and one of the Jin daughters becoming the Qianlong emperor’s concubine. The Jin family built their power based on their membership of the Manchu banner, but they also tried to maintain their Korean identity. When these high officials from the Jin family met Chosŏn tribute ambassadors, they shared their ethnic background with the Korean visitors. In addition to revealing their Korean identity, members of the Jin family also tried to use their political influence to help Korean ambassadors solve diplomatic issues between the Qing and Chosŏn courts. The story of the Jin family addresses Korean agency in the building of the Qing empire, as well as the ways in which identity politics played out in Qing banner society.