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In page Zhejiang:

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Since ancient times, north Zhejiang and neighboring south Jiangsu have been famed for their prosperity and opulence[citation needed] and simply inserting north Zhejiang place names (Hangzhou, Jiaxing, etc.) into poetry gave an effect of dreaminess, a practice followed by many noted poets. In particular, the fame of Hangzhou (as well as Suzhou in neighboring Jiangsu province) has led to the popular saying: "Above there is heaven; below there is Suzhou and Hangzhou" (上有天堂,下有苏杭), a saying that continues to be a source of pride for the people of these two still prosperous cities.