work fruitlessly
Cooking with sand is a Chinese idiom. Its pinyin is Chu ī sh ā Zu ò m í, which means cooking with sand. It is a metaphor for futility. It's from to Wang Lang.
The origin of Idioms
In Song Dynasty, Huang Tingjian's poem "send Wang Lang away", he said, "I'm not satisfied with cooking, but it takes a lot of skill to carve out the words on ice."
Idiom usage
As predicate, attribute and object, metaphor is futile.
Chinese PinYin : chuī shā zuò mí
work fruitlessly
The river and the sea are not against the current. jiāng hǎi bù nì xiǎo liú