accidentally
The Chinese idiom, Pinyin is w ù D ǎ w ù Zhu à ng, meaning that it has not been carefully considered in advance. It's from two dreams.
The origin of Idioms
The second fold of Guan Hanqing's "two dreams" in Yuan Dynasty: "the Shang Fu of Banzhu said that Jiang lvwang, a fisherman, was good at moving the kings of the past dynasties. This dream should be the prophet first, but the ministers were wrong."
Idiom usage
Adverbial; unintentional. Xiren said with a smile, "it's just a matter of meeting by mistake. I said I had an appointment, but I didn't have it." A dream of Red Mansions by Cao Xueqin in Qing Dynasty chapter 62
Analysis of Idioms
Close synonym: crooked and upright
accidentally
the dragon 's liver and the phoenix 's marrow - lín gān fèng suǐ