炊沙作饭

Explanation: Sand boil for rice. Analogy in vain, in vain 　　Usage: -Linked; for the predicate; metaphor in vain 　　Source: Tang Gu, "difficulties in traveling" poem: "Do not you see snow stuffed bear well only force, cooking dinner for ye worthy to eat the sand?" Thesaurus:  Sand to make rice cooking, Mozhuanchengjing, For mirror grinding brick