唯利是图 Profit-driven
Explanation
唯利是图指只顾自己的利益，不顾一切，做事不讲道德，甚至不择手段。
This idiom describes someone who is only interested in profit and will do anything to get it, regardless of morality or ethics.
Origin Story
春秋时期，秦桓公经常不讲信义，他与晋厉公在令狐签订盟约，回国后就背信弃义，怂恿狄、楚去进攻晋国，他对楚王说：“余虽与晋出入，余唯利是视。”晋厉公非常气愤，派大臣吕相去与秦国绝交，两国断交后不久就发生了战争。秦桓公为了自己的利益，不顾信义，最终导致两国交战，给人民带来了灾难。
During the Spring and Autumn Period, Duke Huan of Qin was often untrustworthy. He made a covenant with Duke Li of Jin in Linghu, but after returning home, he broke his promise and incited the Di and Chu to attack Jin. He told the King of Chu: “Although I have been in and out with Jin, I only look at profit.” Duke Li of Jin was very angry and sent his minister Lü Xiang to break off relations with Qin. Soon after the severance of relations, war broke out. Duke Huan of Qin, for his own benefit, ignored his faith, ultimately leading to war between the two countries, bringing disaster to the people.
Usage
这个成语用来形容那些只顾自己利益，不顾他人利益的人。
This idiom is used to describe people who only care about their own interests and ignore the interests of others.
Examples
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他为了利益不择手段，真是唯利是图。
ta wei le li yi bu ze shou duan, zhen shi wei li shi tu.
He would stop at nothing to make a profit, he is really only interested in profit.
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不要只唯利是图，也要考虑道德和责任。
bu yao zhi wei li shi tu, ye yao kao lv dao de he ze ren.
Don't just focus on profit, you also need to consider morality and responsibility.