It's a bit of a joke
In Chinese, Pinyin is l í B ě NQ ū m ò, which means to lose the root and pursue the end. It comes from Xu Gan's Zhonglun Kao pseudo in Han Dynasty.
The origin of Idioms
Han XuGan's Zhonglun Kao pseudo: "in order to poison the people of the world, it is necessary to depart from the original and interesting, and make things false."
Analysis of Idioms
Synonym: abandon the essence and pursue the end
Idiom usage
It means to lose the root and pursue the end
It's a bit of a joke
a man should get married on coming of age - nán dà xū hūn
the country is defeated and the home lost - wáng guó pò jiā