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Kok-ú (穀雨) sī cheh-khùi chi it, Ji̍t-thaû se̍h kaù chhiah-keng 30° ~ 45° hit kúi kang. Sù-siông ùi 4/20 kaù 5/6. Kok-ú mā ē-tit kí Ji̍t-thaû tú-hó tī chhiah-keng 30° hit kang, thong-siông sī 4/20.