This article does not have any sources. (June 2018)
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 make up more than 37% of the population. In 1957-58, an influenza virus spread to most of the world and killed between 1-4 million people.