Abstract: After the establishment of the Qing suzerainty over Vietnam，the appointment of a Vietnamese emissary to the Qing Empire became a common practice．Considering the special role played by the incumbent in maintaining the diplomatic ties between China and Vietnam，the Vietnamese dynasty attached great importance to the selection of the envoys who paid tribute to the Qing emperors for over 200 years．The selection of each envoy had become a major event in Vietnamese political life．All candidates were subject to strict assessment of their ability and rhetorical skills． The final candidates were Vietnamese national elites who had both sophisticated diplomatic skills and good Confucian education．As the implementers of tributary obligations to the Qing dynasty，the Vietnamese envoys who carried out diplomatic activities in Beijing were directly concerned with the overall relationship between the two countries．In order to ensure the normal operation of the suzerain-vassal order between China and Vietnam，the Vietnamese dynasty established a scientific and formal selection and management process．