unexpected disaster
Unexpected calamities refer to unexpected calamities, which comes from the biography of Zhou Rong in the book of the later Han Dynasty by Fan Ye of the Southern Dynasty.
An unexpected disaster. [source] in the Southern Dynasty, Song Dynasty, Fan Ye's "Hou Han Shu · biography of Zhou Rong", it is said that "if a death happens to fly, there will be no funeral." [example] I'm not too young. I met this again at home. I don't know what happened. A dream of Red Mansions by Cao Xueqin in Qing Dynasty chapter 90
unexpected disaster
On the mountain, too busy - shān yīn dào shàng,yìng jiē bù xiá