trace back to the sources
The Chinese idiom, Pinyin is Zhu ī B ě nqi ó ngyu á, which means to find out the source of things. From the romance of Hong Xiuquan.
Idiom explanation
Poor: seeking to the end.
The origin of Idioms
In the second chapter of the romance of Hong Xiuquan, "it is true that Chinese merchants have been selling opium in search of its source."
trace back to the sources
hold on to one 's wrong belief till death - zhì sǐ bù wù
consider others in one 's own place - tuī jǐ jí wù
have an uninterrupted career of advancement - gān tóu rí shàng