久旱逢甘霖[雨] [- hàn fénɡ ɡān lín]a good rain after a long drought — to have a long-felt need satisfied; get a sweet [genial] shower after a long drought; have a welcome rain after a long drought:
•¶久旱逢甘霖[雨], 他乡遇故知。 To meet an old friend in a distant land is like refreshing rain after a long drought.