绝薪止火

Explanation: Must: cut off; salary: firewood. Cut firewood, so that the fire stops burning. Analogy to solve the problem fundamentally. 　　Source: "Lu count them out," Young Tom just boiling, boiling more than, a goal is just carry on. "Han Mei Sheng" letter to admonish Wu Shu "one drink, a hundred Young's, is also useless, as it must pay only the fire."