Over the wall
It's a Chinese idiom, y ú Qi á ngyu è sh ě in pinyin, which means to cross the wall and leave soon. It comes from the story of Yuan Hua, Cui Shensi.
The origin of Idioms
Huang Fu's "Yuan Hua Ji Cui Shen Si" in the Tang Dynasty said: "after the speech, I left, so I went over the wall."
Idiom usage
Used as an attributive or adverbial; used in writing.
Over the wall
to open or find a new path or snap course - lìng pì xī jìng
Food for the West and sleep for the East - xī shí dōng mián