ㄘㄨㄥˊㄊㄧㄢˊㄐㄧㄤˋcóngtiān’érjiàng

从天而降
  1. 比喻事物來得突然人意想不到 喜訊從天而降高興好久」。

lit. to drop from the sky (idiom)​, fig. to appear unexpectedly, to arise abruptly, out of the blue, to drop into one's lap
(expr. idiom.)​ tomber du ciel, apparaître de façon inattendue, à l'improviste