get to the bottom of the matter
Qiongyuan Jingwei, a Chinese idiom, Pinyin is Qi ó ngyu á NJ ì NGW ě I, which means to describe the development process of things. It's from the book of rites.
Idiom explanation
Poverty and competition: thorough pursuit; source: origin; Commission: end.
The origin of Idioms
In the book of rites, Xueji: "the sacrifice of the three kings to Sichuan is first followed by the sea, either from the source or by the Commission, which is called Wuben."
Idiom usage
Make a thorough understanding of the whole story. In the biography of Xu Zhenming in the history of Ming Dynasty, it is said that "the river will be dredged again."
get to the bottom of the matter
No fear in the face of difficulties - lín nàn bù kǒng
keep going by painstaking effort - cǎn dàn jīng yíng
all one can see is grief -- full of grief everywhere - mǎn mù qī liáng