Plain Blue Banner, Inner Mongolia
| Plain Blue Banner 正蓝旗 • ᠰᠢᠯᠤᠭᠤᠨ ᠬᠥᠬᠡ ᠬᠣᠰᠢᠭᠤ Zhenglan, Xulun Hoh, Shuluun Huh | |
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| Plain Blue Banner in Xilin Gol League | |
| Coordinates: 42°14′31″N 115°59′31″E / 42.242°N 115.992°E | |
| Country | China | 
| Autonomous region | Inner Mongolia | 
| League | Xilin Gol | 
| Banner seat | Shangdu Town (Xangd) | 
| Area | |
|  • Total | 10,210 km2 (3,940 sq mi) | 
| Population  (2020) | |
|  • Total | 69,908 | 
| • Density | 6.8/km2 (18/sq mi) | 
| Time zone | UTC+8 (China Standard) | 
| Website | www | 
| Plain Blue Banner, Inner Mongolia | |||||||
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| Chinese name | |||||||
| Simplified Chinese | 正蓝旗 | ||||||
| Traditional Chinese | 正藍旗 | ||||||
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| Mongolian name | |||||||
| Mongolian Cyrillic | Шулуун хөх хошуу | ||||||
| Mongolian script | ᠰᠢᠯᠤᠭᠤᠨ ᠬᠥᠬᠡ ᠬᠣᠰᠢᠭᠤ | ||||||
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Plain Blue Banner (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. It is under the administration of Xilin Gol League. Xanadu or Yuan Shangdu, one of the capitals of the Yuan dynasty, was located here. Today the ruins of Yuan Shangdu are listed as UNESCO world heritage site and are open to the public.