Sell a calf and buy a knife
Selling a calf to buy a knife, a Chinese idiom, Pinyin is m à ID ú m à ID à o, meaning to sell cattle, buy weapons to join the army. It's from Wen Jian Qian Lu.
The origin of Idioms
Shao Bowen of Song Dynasty, the sixth volume of Wen Jian Qian Lu: "why bother the people, sell calves and buy knives?"
Idiom usage
Used as a predicate, an object, or an attribute; used in preparation for war.
Sell a calf and buy a knife
keep up appearances and be wasteful - pū zhāng yáng lì
Eclipses of the sun and the moon - rì yuè jiāo shí
be all eyes and all ears - yǎn guān sì lù,ěr tīng bā fāng