【危在旦夕】〖wi zài dàn x〗[on the verge of death or destruction; at death's door; be at the last gasp; be in deadly danger]

危如累卵台独乱，

在所难免一窝端。

旦不发生轰蔡府，

夕将遭遇巡航弹。

形容危险就在眼前。Describe  danger was in before sight. 同：朝不保夕、危如朝露。反：安如盘石。歇：风前烛，瓦上霜、快要倒塌的房子。谜：午安。