Langao is a county in China, located in the south of Shaanxi province under the administration of the city of Ankang. It lies in the southern part of the province, bordering Chongqing municipality to the south.
The area is mountainous, sitting in the Daba Mountains region of southern Shaanxi, and its administrative seat is the town of Chengguan. As a county-level division, Langao covers a largely rural territory of towns and townships rather than a single dense urban centre.
Note that the subject specified here is the Shaanxi county of Langao; the reference material provided concerns Langao County in Shaanxi, and no separate city of this name in Shandong is documented in the available sources.