willingly and gladly
Gan Xin Qing Yuan is a Chinese idiom. Pinyin is g ā nx ī NQ í ngyu á n, which means that the heart is completely willing, without any reluctance. It refers to making some kind of sacrifice voluntarily. The source is "Zhiqing zashuo · xiangsilong".
The idiom comes from "Zhiqing zashuo · xiangsilang" written by Wang Ming and Qing of Song Dynasty: "this matter is willing."
willingly and gladly
break open a way through bramble and thistle - pī jīng zhǎn jí
mountain food and wild vegetables - shān yáo yě sù