 It is one of the tributaries of the country's chief river, the Ayeyarwady, and arises in Yunnan Province of China.It flows through northern Shan state and Sagaing Division, and enters the Ayeyarwady at Inywa, 60 km north of Tagaung and south of Katha.Tai people, known as Shan in Burma, migrated from Yunnan into Burma along the Shweli.