Definition of "Haixi"

Now, west of the azure lake from which Qinghai derives its name, are the many prisons of what is now officially called the “Haixi Mongolian and Tibetan Autonomous Prefecture.” Although it is only one of eight prefectures in Qinghai, Haixi comprises 45 percent of the province’s territory. It is sparsely populated, so the 5.2 percent prisoner share of the total population is large compared to other prefectures.

1998, James D. Seymour, Richard Anderson, New Ghosts Old Ghosts Prisons and Labor Reform Camps in China‎, page 136

But critics argue that moving these farmers, who are mainly Han Chinese and members of the minority Hui, Tu and Salar ethnic groups, will further erode the position of the Tibetan inhabitants of Dulan County in Haixi Prefecture, where the farmers are to be resettled and which is a designated Tibetan and Mongolian Autonomous Area. Tibetans are already in a minority there. […] In Haixi Prefecture, the Tibetan percentage of the population would fall from 11.1 percent to 10.3 percent, while in Dulan County it would decline from 22.7 percent to 14 percent. For Mongolians the declines are from 7.6 percent to 6.5 percent and from 14.1 percent to 6.7 percent.The number of Han Chinese in Haixi Prefecture would rise from 236,918 to 261,375 and in Dulan County from 27,977 to 52,434.

1999 May 30 , Paul Lewis, “U.S. May Try To Stop Loan Seen as Bad For Tibetans”, in The New York Times‎, archived from the original on 27 May 2015, World‎