Aba (Ngawa) Tibetan and Qiang Autonomous Prefecture is situated in
northwestern Sichuan Province, the eastern end of the Qinghai-Tibet Plateau. It neighbors Qinhai
and Gansu provinces in the north.
For thousands of years, a multitude of Chinese ancient ethnic
minorities, including Qiang, Sienpi (Xianbei), Tubo and Hui, had
worked collaboratively on the development of Aba, leaving the land
abundant culture accumulations of ethnic minorities. The prefecture
was changed into Aba Tibetan Autonomous Prefecture in 1955 and Aba
Tibetan and Qiang Autonomous Prefecture in 1987.
Tableland and alpine valleys make up the main landform of the
prefecture. Parts of the Qinghai-Tibetan Plateau and the Hengduan
Mountains extend to its territory. Alpine valleys are mainly
distributed in the southeastern part, while its northwestern land
is plateau region. Minjiang River and Dadu River, tributaries of
the upper Yangtze River, flow across Aba which is the only place in
Sichuan Province having the Yellow River flow through.