The dynasty declared by Wang Mang during his rule over imperial China during AD 9-23
The Xin dynasty was a short-lived Chinese empire established by Wang Mang that ruled from AD 9 to 23. It matters historically because it interrupted the Han dynasty's long reign and represented an unusual period when power shifted away from the traditional imperial family to someone who claimed a mandate to reform the government.
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Modern
Republic of China (mainland, 1912–1949)
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).