Mongolia (Mongolian: , and , Mongol Uls) is a landlocked country in east-central Asia. It is bordered by Russia to the north and China to the south, east and west. Ulaanbaatar, the capital and also the largest city, is home to about 45% of the population. Mongolia’s political system is a parliamentary republic. The area of what is now Mongolia has been ruled by various nomadic empires, including the Xiongnu, the Xianbei, the Rouran, the Turkic Khaganate, and others. In 1206, Genghis Khan founded the Mongol Empire, and his grandson Kublai Khan conquered China to establish the Yuan Dynasty. After the collapse of the Yuan, the Mongols retreated to Mongolia and resumed their earlier pattern of factional conflict except the era of Dayan Khan and Tumen Zasagt Khan. In the 16th centuries, Tibetan Buddhism began to spread in Mongolia and it has been accelerated by the unwavering support of Qing governments after Mongolia had been incorporated by the Qing dynasty. In the 1900s, almost half of the adult male population were Buddhist monks. By the mid-18th century, all of Mongolia had been incorporated into the area ruled by the Manchus’ Qing Dynasty. During the collapse of the Qing Dynasty the Mongols established Temporary Government of Khalkha in 30 November 1911, before the abdication of the last Qin emperor and the estabilishment of the Republic of China. On 29 December 1911 Mongolia declared independence from the Qing Dynasty and this National Liberation Revolution ended 220 years of Manchu rule (153 years after the collapse of the Zunghar Khanate). Shortly thereafter, the country came under Soviet influence, resulting in the proclamation of the Mongolian People’s Republic as a Soviet satellite state in 1924. After the breakdown of communist regimes in Europe in late 1989, Mongolia saw its own peaceful democratic revolution in early 1990; it led to a multi-party system, a new constitution of 1992, and transition to a market economy. At , Mongolia is the 19th largest and one of the most sparsely populated independent countries in the world, with a population of around 3 million people. It is also the world’s second-largest landlocked country. The country contains very little arable land, as much of its area is covered by steppe, with mountains to the north and west and the Gobi Desert to the south. Approximately 30% of the population are nomadic or semi-nomadic. The majority of its population are Buddhists and non-religious population is the second largest group. Islam is the dominant religion among ethnic Kazakhs. The majority of the state’s citizens are of Mongol ethnicity, although Kazakhs, Tuvans, and other minorities also live in the country, especially in the west. Mongolia joined the World Trade Organization in 1997 and seeks to expand its participation in regional economic and trade regimes.