唐努乌梁海
Tannu Uriankhai (, ; , "Tagna Urianhai"; , "Urjanchajskij kraj", ; ) is a historic region of the Mongol Empire (and its principal successor, the Yuan dynasty) and, later, the Qing dynasty. The realms of Tannu Uriankhai largely correspond to the Tuva Republic of the Russian Federation, neighboring areas in Russia, and a part of the modern state of Mongolia.