More than 300 years of history. Ulaanbaatar was founded in the fourth year of Chongde in Qing Dynasty (1639). It turned out to be the largest living Buddha in Kerkha, Mongolia, stationed in tin. In the forty-third year of Qianlong (1778), Zhebuzundanba set up a city defense in its residence, named Kulun, which means grassland surrounded by fences. In the Qing Dynasty, Cullen was under the jurisdiction of General Ulyasutai and was the flag of Tushetu Khan. The VIII Zhebuzundan declared the independence of Ulyasutai (Outer Mongolia) and became the emperor. 192 1 year, the Mongolian revolution was successful and a constitutional monarchy was established, with the capital of Cullen.