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Wü is a term that can refer to several different things, primarily found in geographical names and personal names. In Chinese, "Wü" (often romanized as Wu) is a common surname and also appears in place names, most notably the ancient state of Wu and the modern municipality of Wuxi. The historical state of Wu was a significant entity during the Spring and Autumn period of Chinese history, located in the Yangtze River delta region. Its culture and influence were notable in its time.

In some contexts, "Wü" might be a phonetic transcription of words in other languages or dialects. Without further specification, its exact meaning can vary greatly. It is important to consider the context in which the term "Wü" is used to determine its specific reference. For instance, if encountered in a historical text about China, it is likely related to the state or surname. If found in a different linguistic or cultural context, its meaning would need to be independently verified. The character 吳 (Wu) is central to many of these references in East Asian cultures.