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In page Mongolia:

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Outer Mongolia was given relative autonomy, being administered by the hereditary Genghisid khanates of Tüsheet Khan, Sechen Khan, Zasagt Khan and Sain Noyon. The Jebtsundamba Khutuktu had immense de facto authority. The Manchu forbade mass Chinese immigration into the area, which allowed the Mongols to keep their culture. The main trade route during this period was the Tea Road through Siberia; it had permanent stations located every 25 to 30 kilometers (16 to 19 mi), each of which was staffed by 5–30 chosen families.[citation needed]