The county is regionally and nationally renowned for the production of Ejiao, a donkey-hide gelatine used in traditional Chinese medicine.
According to a ca. 1723 account by the French JesuitsDominique Parrenin, there was a well in this county which was normally kept closed and sealed, and which was only opened when water was taken to be used in preparation of Ejiao for the emperor's court.[3]
Administrative divisions
As 2012, this County is divided to 2 subdistricts, 7 towns and 2 townships.[4]
^Gobien, Charles Le; Halde, Jean-Baptiste Du; Querbeuf, Yves Mathurin Marie Tréaudet de; Maréchal, Nicolas; Patouillet, Louis (1819), Lettres Édifiantes Et Curieuses, Écrites Des Missions Étrangères: Mémoires de la Chine, Volume 10 of Lettres Édifiantes Et Curieuses, Écrites Des Missions Étrangères, Lettres Édifiantes Et Curieuses, Écrites Des Missions Étrangères (in French) (reprint ed.), J. Vernarel, pp. 479–481 (E xian (for Dong'e) Ejiao are transcribed Ngo-hien and Ngo-kiao, under the transcription system then in use).