Looking for a gap
Chinese idiom, Pinyin is Ku ī Ji à ns ì x ì, which means to observe secretly, ready to take action. It comes from the book of pumila on Gong.
Idiom explanation
Peep: observe in secret; wait: wait for opportunities. Watch in the dark, ready to take action.
The origin of Idioms
According to the book of pumila on gonglun written by Wu Qiushou king of Han Dynasty, "Qin used Shang Yang's and Li Si's tactics internally and Bai Qi's and Wang Jian's troops externally to watch the gap between the two sides. After he conquered the sea, he used power as the most important way and power and deceit as the most important skill."
Idiom usage
It's all up to me to make such a quarrel. The book with Sato mishilang by Zhu Zhiyu in Ming Dynasty
Looking for a gap
bide one 's time during a period of ill luck - zūn shí yǎng huì
strike out a new path for oneself - zì chū jī zhù