Plain Blue Banner[2] (Mongolian: ᠰᠢᠯᠤᠭᠤᠨ ᠬᠥᠬᠡ ᠬᠣᠰᠢᠭᠤ, pronounced [ʃʊˈɮʊːɴ xɵx χɞˈʃʊ]; Chinese: 正蓝旗), alternatively Zhenglan Banner in Chinese or Xulun Hoh Banner in Mongolian, is a banner of Inner Mongolia, China, bordering Hebei province to the south.

Today the ruins of Yuan Shangdu are listed as UNESCO world heritage site and are open to the public.

Plain Blue Banner is divided into 3 towns and 4 sums.

The area has a cold semi arid climate (Koppen: BSk).

This Inner Mongolia location article is a stub.