请将以下内容总结在3句话内。 Hutong is a type of narrow street or alley commonly found in old neighborhoods, especially in Beijing. They are remnants of a bygone era, maintaining the historic charm and cultural significance. These alleys offer a unique view into the traditional lifestyle and architectural beauty of old Beijing, with many now turned into cultural buildings or commercial spaces for tourists.
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胡同是北京老城区常见的狭窄街道或小巷，保留了历史魅力和文化价值。它们展现了老北京的传统生活方式和建筑美学，一些巷子现已转型为文化旅游或商业空间。胡同的存在让游客能够一窥旧时北京的独特风情。
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