This page explains the Chinese idiom Yùn jīn chéng fēng from Zhuangzi ‑ Xu Wugui. Telling Carpenter‑Shi’s axe‑feat, it stresses supreme skill needs a trusting counterpart, also evoking grief over losing one’s worthy confidant.
This entry explains idiom “Mu wu quan niu” from Zhuangzi ‑ Yangshengzhu. Stemming from Cook Ding’s parable, it describes consummate expertise: experts perceive inner structures instead of only seeing a whole surface.