to Peking. Some of the traders were Central Asians. The round trip took from ten to twelve months. The trade was apparently profitable to the Russians but less so to the Chinese. The Chinese were also disenchanted by the drunken brawls of the traders. In 1690 the Qing defeated the Oirats at the Great Wall and gained complete control over the Khalka Mongols in Inner Mongolia. In 1696 the Oirats were defeated and driven back to the Altai Mountains (Kangxi Emperor in person with 80,000 troops in a battle near Ulan Bator). This opened the possibility of trade from Baikal southeastward and raised the problem of the northern border of Outer Mongolia. In March 1692 Eberhard Isbrand Ides, a Dane in the Russian service, was sent from Nerchinsk as ambassador. The Manchus raised the question of the border west of the Argun. Ides returned to Moscow January 1695. From this time it was decided that the China trade would be a state monopoly. Four state caravans travelled from Moscow to Peking between 1697 and 1702. The fourth returned via Selenginsk (near Lake Baikal) in 90 days and bore a letter from the Li-Fan Yuan suggesting that future trade use this route. In 1712 Tulishen became the first Manchu or Chinese official to visit Russia (not counting earlier visits to Nerchinsk). He was mainly interested in the Kalmyks along the Caspian Sea and how they might be used to deal with their cousins, the Oirats. He left Peking in June 1712 and reached Tobolsk in August 1713. Here he learned that he could not see the Tsar because of the Swedish wars. He went to Saratov and down the Volga to visit Ayuka Khan of the Kalmyks. He returned to Peking in April 1715. His report, 'Yiyilu' of 'Record of Strange Regions' was long the main source of Chinese knowledge of Russia. About this time the Kangxi Emperor began to put pressure on Saint Petersburg to delineate the Mongolian border west of the Argun, and several Russian caravans were held up. In July 1719 Lev Izmailov was sent as ambassador to Peking where he dealt with Tulishen, but the Chinese would not deal with the trade problem until the border was dealt with. Izmailov returned to Moscow in January 1722. Lorents Lange was left as consul in Peking, but was expelled in July 1722. He returned to Selenginsk and sent reports