初伏

chūfú

the first fu—the first of the three ten-day periods of the hot season, the first day of the first fu (falling in mid-July)

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chu1 fu2

middle ten days of July, the first of 三伏 sān fú, three hottest periods of the year

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初伏|初伏 [chū fú] ► middle ten days of July, the first of ↑三伏 sān fú, three hottest periods of the year