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
gnash the teeth with angry looks - chēn mù qiē chǐ
remain calm and composed while handling pressing affairs - hào zhěng yǐ xiá
Tongshan collapses in the West and Luozhong responds in the East - tóng shān xī bēnɡ,luò zhōng dōng yìng