The Song Dynasty released a law that forbade foreign merchants to reside in the urban areas. However, for most of the time, the law was not strictly enforced.

宋朝发布了不准外商在城市中居住的法律，但多数时候并没有坚决实施。

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In the Song Dynasty, urban economy flourished and popular recreations such as storytelling, variety show, singing and dancing attracted more and more audience in cities and towns.

宋代都市经济繁荣，说书、杂耍、歌舞等通俗娱乐艺术成为都市的一大行业。

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This article discussed the Fang of local cities in the Ming dynasty after the urban Li-Fang system in Tang and Song dynasty had broken.

本文主要论述唐宋坊市制崩溃以后，明代地方城市中“坊”之情形。明代地方志所记之“坊”，有牌坊、街坊、乡坊和坊图四种不同涵义。

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Rural birds were confused by urban bird song while city birds "didn't understand the lower rural pitch".

BBC: Birds in cities 'singing louder'

Brown, whose other works include the short-lived Broadway musicals "Urban Cowboy" and "13, " and another acclaimed song cycle "Songs for a New World, " is enjoying a purple patch of late.

WSJ: Songwriter Jason Robert Brown revisits tough times