Introduction. In the 1740s–1780s, decentralization processes within the Kazakh Khanate led to that it was involved into somewhat troubled foreign policy relations. The period of struggle for political independence witnessed the emergence of Abylai — among most authoritative leaders of the Kazakh Khanate — as a key political decision-maker of the Great Steppe. His son Uali joined and continued the process of developing diplomatic relations between the Kazakh Khanate and the Qing Empire. In the future, it was a balanced strategy of diplomatic maneuvers under conditions of dual citizenship that constituted the basis of the latter ruler’s administrative agenda across Kazakh lands. Goals. Thus, the study aims to examine Abylai and Uali’s diplomatic relations with the Qing Empire. The paper shall also explore archival materials for data pertaining to diplomatic endeavors of Uali which are scarce enough as compared to those on Abylai’s activities. Materials and methods. The work focuses on documents stored at the Historical Archive of Omsk Oblast, Archive of Foreign Policy of the Russian Empire, and Russian State Archive of Ancient Acts. Quite a number of the documents from the Historical Archive of Omsk Oblast have been declassified only in 2019, and were never introduced into wide scholarly circulation. The newly obtained records reveal certain historical facts, including about certain diplomatic endeavors definitely adding to the little-known personality of Khan Uali. The currently available documentary evidence dealing with the events of the 18th–19th centuries virtually shed no light on Uali’s role in historical processes. Our search for information about activities of this historical figure shows how poorly investigated the latter is. The study employs the principles of scientific and historical knowledge, with due regard the value approach. Results. The Kazakh-Qing land-related negotiations after the collapse of the Dzungar Khanate continued with the establishment of trade and economic relations — to witness an increase in mutual diplomatic missions. So, Abylai faced an opportunity to obtain the Qing citizenship as a basis for further development of ties with the Manchu imperial palace. The Qing citizenship of Kazakh rulers Abylai and Uali did significantly expand room for political maneuver of theirs. Abylai is still considered to be a key figure in establishing Kazakh-Qing diplomatic relations, he who had taken the bulk of the responsibility — in this matter — among the then individuals of power and influence in the Steppe. Whereas, the role and activities of Uali remain little-known when it comes to discuss diplomatic relations between the Kazakhs and neighboring states.