The flesh and the bone
As a Chinese idiom, Pinyin is R ǎ NGJ ī J í g ǔ, which means invasion of hinterland. From fayan Chongli.
The idiom comes from "Fa Yan Chong Li" written by Yang Xiong of Han Dynasty: "it is within the four regions, each invading with its own strength, and it can stir up the flesh and bones. How can Nan Du control Qin?"
The flesh and the bone
suffer all kinds of difficulties - bèi cháng jiān kǔ