rely on one another as cheek and jowl
Fu Che Xiang Jiang, a Chinese idiom, Pinyin is f ǔ ch ē Xi ā ngji ā ng, which means that the two are closely related and interdependent. It's the same as "auxiliary vehicles depend on each other". From Guan Longping.
The origin of Idioms
In Qing Dynasty, ye fangai's poem "Guan Longping" said: "face Shu elbow cool, assistant car prime minister."
Idiom usage
Used as a predicate or attributive; closely related
rely on one another as cheek and jowl
prey upon one 's country and injure the people - dù zhèng hài mín
sit idle and eat , and in time one 's whole fortune will be used up - zuò chī shān bēng
one 's mouth sticks out and one has a chin like an ape 's. - jiān zuǐ hóu sāi