白露 Bailu (White Dew) is the 15th solar term. The weather has already turned cool and water vapor condenses into dewdrops on vegetation overnight, hence the name. Temperatures drop rapidly and there is continuous rain in certain parts of China such as the southwest. It becomes important to keep warm and prevent autumn dryness. Traditional foods for these period include longans (in Fuzhou, Fujian), wine, grapes and sweet potatoes.