| Plain Blue Banner | |
| Other Name: | Zhenglan, Xulun Hoh, Shuluun Huh |
| Settlement Type: | Banner |
| Pushpin Map: | China Inner Mongolia#China |
| Pushpin Label: | Plain Blue |
| Pushpin Map Caption: | Location in Inner Mongolia |
| Coordinates: | 42.242°N 115.992°W |
| Subdivision Type: | Country |
| Subdivision Name: | China |
| Subdivision Type1: | Autonomous region |
| Subdivision Name1: | Inner Mongolia |
| Subdivision Type2: | League |
| Subdivision Name2: | Xilin Gol |
| Seat Type: | Banner seat |
| Seat: | Shangdu Town (Xangd) |
| Area Total Km2: | 10,210 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 69,908 |
| Population Density Km2: | auto |
| Timezone: | China Standard |
| Utc Offset: | +8 |
| Postal Code Type: | Postal code |
| Mon: | Шулуун хөх хошуу |
| Monr: | Shuluun höh hoshuu in Mongolian pronounced as /ʃʊˈɮʊːɴ xɵx χɞˈʃʊ/ |
| Order: | st |
| S: | 正蓝旗 |
| T: | 正藍旗 |
| P: | Zhènglán Qí |
Plain Blue Banner[2] (Mongolian:, in Mongolian pronounced as /ʃʊˈɮʊːɴ xɵx χɞˈʃʊ/;), 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.
Plain Blue Banner is divided into 3 towns and 4 sums.
| Name | Simplified Chinese | Hanyu Pinyin | Mongolian (Hudum Script) | Mongolian (Cyrillic) | Administrative division code | |
|---|---|---|---|---|---|---|
| Towns | ||||||
| Shangdu Town (Xangd) | Chinese: 上都镇 | Mongolian: Шанд балгас | 152530100 | |||
| Sanggin Dalai Town | Chinese: 桑根达来镇 | Mongolian: Сангийн Далай балгас | 152530101 | |||
| Habirag Town | Chinese: 哈毕日嘎镇 | Mongolian: Хавирга балгас | 152530102 | |||
| Sums | ||||||
| Boxodoi Sum | Chinese: 宝绍岱苏木 | Mongolian: Буушуудай сум | 152530200 | |||
| Nart Sum | Chinese: 那日图苏木 | Mongolian: Нарт сум | 152530201 | |||
| Sain Hudag Sum | Chinese: 赛音呼都嘎苏木 | Mongolian: Сайнхудаг сум | 152530202 | |||
| Jagastai Sum | Chinese: 扎格斯台苏木 | Mongolian: Жагастай сум | 152530203 | |||
| Others | ||||||
| Wuyi Breeding Stock Farm | Chinese: 五一种畜场 | Mongolian: Үү И малжлын талбай | 152530500 | |||
| Heichengzi Demonstration Plot | Chinese: 黑城子示范区 | Mongolian: Борхот жишээ үзүүлэх дугараг | 152530501 | |||
The area has a cold semi arid climate (Koppen: BSk).