idiom > Call-source equivocation
Contents
叩源推委
Pinyin: kòu yuán tuī wěi

Explanation: 追究其根源。

No. 2
　　Investigate its causes. Ming Wang Shizhen "Entertainment Zhiyan" Juan Liu: "Xuchang Valley though not knock the source Selection Committee, but the wind to increase the show, 10 can not get five."
Translated by Google