Guizhou, formerly romanized as Kweichow, is a province of the People's Republic of China located in the southwestern part of the country. Its capital city is Guiyang. Guizhou is a relatively poor and economically undeveloped province, but rich in natural, cultural and environmental resources. Demographically it is one of China's most diverse provinces. Minority groups such as the Miao/Hmong and Yao account for more than 37% of the population.