If the alertness of the state is not high, it is similar to the swallows buidling a nest on the curtains, the fishes swimming in a pot where their demise is near.

• 如果不能居安思危，就是敌军打到了家门口也不会警觉，就好像燕子将窝筑在门帘上一样，鱼儿在鼎锅里游荡一样，离灭亡的时刻很近了。