trace back to the sources
Chinese idiom, Pinyin is j í B ě nqi ó ngyu á n, which means to thoroughly study the origin. From Zhu Zi Yu Lei.
The origin of Idioms
Zhu Xi's Zhu Zi Yu Lei of the Song Dynasty, volume 95: "the nature of extreme poverty in Yichuan's words is the nature of temperament."
Analysis of Idioms
Synonyms: tracing back to the source
trace back to the sources
be plagued by poverty and ill health - pín bìng jiāo jiā
an unexpected or undeserved gain - tǎng lái zhī wù