In 1761, a second amban was appointed for the same purpose, a Manchu one. A quarter-century later, in 1786, a decree issued in Peking gave right to the Urga ambans to decide the administrative affairs of Tusheet Khan and Setsen Khan territories. With this, Urga became the highest civil authority in the country. Based on Urga's Mongol governor Sanzaidorj's petition, the Qianlong Emperor officially recognized an annual ceremony on Bogd Khan Mountain in 1778 and provided the annual imperial donations. The city was the seat of the Jebtsundamba Khutugtus, two Qing ambans, and a Chinese trade town grew four trees or east of the city center at the confluence of the Uliastai and Tuul rivers.