participate in
In the meantime, the Chinese idiom, Pinyin is C è Z ú Q í Ji ā n, meaning to insert a foot in it. It's from the travel debate of the moon.
Notes on Idioms
Toilet feet: step in.
The origin of Idioms
Lu Xun's "argument on travel in the moon world" said: "there is no woman in this period, but still bizarre, not lonely, especially extraordinary."
Idiom usage
Take part in sth.
participate in
even a wise man sometimes makes a mistake - qiān lǜ yī shī