Cock crows at night
Rooster crowing at night is an idiom pronounced Xi ó NGJ ī y è m í ng, which means that in ancient times, rooster crowing at night was regarded as an abnormal phenomenon and a precursor to war.
explain
In ancient times, it was thought that the cock crowing at night was an abnormal phenomenon, which foretold war.
source
"Huainanzi · Taizu Xun" said: "the old man had the ambition to attack the country. The dogs in the city howled, the rooster crowed at night, and the soldiers moved and the troops were startled." Gao Yinzhu: "the rooster crows at night and the army rises, and the Qi is moved."
Cock crows at night
equally difficult to go on or retreat - jìn tuì shī cuò
put new wine into old bottles - jiù píng zhuāng xīn jiǔ