After the Fall of the Ming Dynasty, a western Mongol group established a polity in "Chinese Tartary" as it was sometimes known, or in eastern Xinjiang, expanding southward into southern Xinjiang.
From his youth he cherished the idea of working for the conversion of the Muslims in the Middle East, Russia and Tartary, but later he devoted himself to missionary work among the Jews.
According to Sheng-Wu-Chi's Ming dynasty chronicle ("Our dynasty is informed by military realizations"), in this land the Tungus Weji, Warka and Kurka tribes were established.
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From these lands and nearby Hulun (Amur area), the Japanese have claimed North Asian ancestors, who settled North Japan.
From there, he boated on a canoe for 700 miles along the Amur River to the Channel of Tartary, down the coast to the Sea of Okhotsk, then back to Nikolayevsk-on-Amur.
Though long familiar to locals, it was famously visited in 1947 by English mountaineer Eric Shipton, while he was traveling between Tashkent and Kashgar - and made known to the West in his book Mountains of Tartary.