西都 (Xidu)

《汉书.地理志》载，西河郡有西都县。西都地望有两说。 伊金霍洛旗：艾充根据西都字面含义，认为西都县位于西河郡西部，推定在伊金霍洛旗的车架渠古城。 鄂尔多斯：马孟龙认为根据《秩律》，西都属于西河郡，这一时期汉朝尚未控制秦昭襄王长城以北的领土。结合战国时期赵国在陕北的领土范围在无定河以北，可以推测西都县位于无定河以北，秦昭襄王长城以东，黄河以西的范围内。根据《汉书.地理志》西都县自注“莽曰五原亭”，可知王莽时期西都县曾隶属于五原郡，因此其地当在西汉末年五原郡和西河郡交界的黄甫川。符合条件的县级古城仅有郝家圪台古城。

Xidu is affiliated with the Xihe prefecture in the Western Han Dynasty. The location of the Xidu county has long been debated because the transmitted text does not provide details for the specific location. Ai Chong identifies it with the Chejiaqu city site, while Ma Menglong marks it at the Haojiagatai city site. However, in recent years, the Yulin Institute of Archaeology conducted a survey in the Qiaotoumao city site, collecting pottery shards with “Xidu” inscription. The discovery disprove previous assumptions and suggests that the Qiaotoumao city site is the Xidu county in the Han Dynasty. Near the Qiaotoumao city site, local museums has reported findings of bronze vessels dating to the 5th century BCE, suggesting that the history of the city can be traced back to the Warring States period.