trace to the very roots
It's a Chinese idiom. Pinyin is B á sh ù x ú ng ē n, which means to pull up a big tree just to find the root. It means to investigate thoroughly.
Entry
trace to the very roots
Pinyin
báshùxúngēn
Citation explanation
Pulling up a big tree is to find the root. It is a metaphor to investigate it to the end and thoroughly inquire about the first fold of yuan · anonymous's "peach blossom": "there are many people from the Qin and Jin Dynasties. You can stop questioning us and talk about pulling up trees to find the root." The first part of Su Jiu's running away: I'm just waiting for my tongue to be tongue tied. How can I take him to root. Chapter 17 of Jin Ping Mei: if a villain pokes his finger and tries to root out a tree, we will not be able to protect our wealth. Chapter 26: xue'e is afraid that XiMenqing will come home, dig up a tree to find her roots, blame herself, and go to the upper room to grind. Kneeling on the moon mother, teach Hugh to make noise with him.
Analysis of Idioms
Synonym: to get to the bottom of the matter usage: as predicate and object; same as "to get to the bottom of the matter"
trace to the very roots
repent thoroughly of one's misdeeds - tòng gǎi qián fēi
Cut the heart and crack the liver - pōu xīn chè gān