The Kam people (Kam: , ), officially known in China as Dong people (), are a Kam–Sui people and one of the 56 ethnic groups officially recognized by the People's Republic of China. They live mostly in eastern Guizhou, western Hunan and northern Guangxi. Small pockets of Kam speakers are found in Tuyên Quang Province in Vietnam. They are famed for their native-bred Kam Sweet Rice (), carpentry skills and unique architecture, in particular a form of covered bridge known as the "wind and rain bridge" (). The Kam people call themselves Kam, Geml, Jeml or Gaeml. History The Kam are thought to be the modern-day descendants of the ancient Rau peoples who occupied much of southern China. Kam legends generally maintain that the ancestors of the Kam migrated from the east. According to the migration legends of the Southern Kam people, their ancestors came from Guangzhou, Guangdong and Wuzhou, Guangxi. The Northern Kam maintain that their ancestors fled Zhejiang and Fujian because of locust swarms. Some scholars (mainly Chinese) also believe that the Kam were a branch of the Bai Yue from the first century CE. The Bai Yue inhabited the Yangze River basin after the collapse of the Yue Kingdom around the first century CE which led to the establishment of many small chiefdoms. The first explicit mention of the Kam (or Dong) people come from Ming Dynasty sources. Many Kam rebellions took place during the Ming and Qing Dynasties, but none were successful in the long run. The Qing developed extensive irrigation systems in the area and rice harvests increased significantly but this mostly benefited the local landlords. The Kam were further exploited after the first Opium War of 1840–1842 by western forces, capitalists, landlords, usurers and Qing officials. As a consequence of these events, many Kam helped or joined the Chinese Communists soon after its founding in 1921. They supplied food and resources to the Red Army as it passed through Guangxi during the Long March. Some Kam also allied with the People's Liberation Army through establishing guerilla units against the forces of Chiang Kai-Shek. After 1949, infrastructure was quickly developed in Kam areas. Schools, roads, small factories and more were built. Many Kam also became government officials. Although the Kam and Han Chinese peoples generally get along well today, the history of Guizhou is marked by innumerable tensions and conflicts between the Han Chinese and