trace to the very source of sth.
It is a Chinese idiom with a Pinyin of Qi ó ngyu á ns ù Li ú, which means to explore and trace the origin of things. From modern Chinese dictionary, 5th Edition.
Idiom explanation
Metaphor explores and traces the origin of things.
The origin of Idioms
Modern Chinese dictionary, 5th Edition.
trace to the very source of sth.
the more honourable , the more humble - sān mìng ér fǔ
travel day and night with all possible speed - zhòu yè jiān xíng
wobble along like a duck or a goose - yā bù é xíng
the sea turns into mulberry fields and vice versa - sāng tián cāng hǎi