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The term Three Furnaces (simplified Chinese: 三大火炉; traditional Chinese: 三大火爐; pinyin: sān dà huǒlú) refers to the especially hot and oppressively humid summer weather in several major cities in the Yangtze River Valley, within China. It was coined during the Republican period[when?] of China, and refers to the following cities:
Yet the above names originate mainly from popular opinion, not necessarily on the basis of data. Meteorologists only give the title "Three Furnaces" to Fuzhou, Hangzhou, and Chongqing. The next seven hottest cities (2000—2009), are Changsha, Wuhan, Haikou, Nanchang, Guangzhou, Xi'an, and Nanning. Unlike the other cities, Xi'an, the capital of Shaanxi province, lies within the northwest.
- "为什么重庆、武汉、南京有“三大火炉”之称？" (in Simplified Chinese). Guangzhou Popular Science News Net (广州科普资讯网). 2007-09-12. Retrieved 2010-11-29.