draw on butter or carve ice
Painting on water and carving on ice, a Chinese idiom, Pinyin is Hu à Shu à L à UB à ng, which means painting on water and carving on ice. It's a metaphor for working in vain. From new theory.
Analysis of Idioms
Painting and painting
The origin of Idioms
Huan Tan's Xin Lun in Han Dynasty: "painting water and carving ice, dispelling with time."
Idiom usage
Used as an object or attribute; used in dealing with affairs.
draw on butter or carve ice
remain calm and composed while handling pressing affairs - hào zhěng yǐ xiá
the feather is not yet fully grown - yǔ máo wèi fēng
Be modest and able to bear the talent - jīn néng fù cái