Wikipedia
Ankang (安康) is a prefecture-level city in southern Shaanxi Province in the People's Republic of China.
Ankang is a name shared by a number of psychiatric hospitals or asylums in China. The term literally means "peace and health [for the mentally ill]". Many of these institutions are prison-hospitals for holding prisoners judged to be mentally ill, and operate directly under the local Public Security Bureau. As a result, "ankang" is sometimes used in the Western press to denote the system of prison-hospitals in China. However, not all ankang hospitals are prison-hospitals, and some offer conventional psychiatric and medical treatment services.
Some patients sent to these institutions are political prisoners or Falun Gong practitioners. By some estimates 3,000 political prisoners are held in about 25 ankang institutions across China.