坐视不理 stand idly by
Explanation
指对应该处理的事情置之不理，漠不关心。
Refers to ignoring things that should be dealt with, indifferent.
Origin Story
战国时期，秦国攻打韩国，韩国危在旦夕。邻国的魏国却坐视不理，甚至暗中支持秦国，最终导致韩国灭亡。魏国这种做法引发了广泛的谴责，成为后世批判的对象。魏国的做法不仅损害了自身利益，也破坏了国际关系，成为历史上的一个教训。后人常以此为例说明，面对不公正的行为，不能袖手旁观，而应该挺身而出，维护正义。
During the Warring States period, the State of Qin attacked the State of Han, and Han was on the verge of destruction. The neighboring state of Wei stood idly by, and even secretly supported Qin, which eventually led to the destruction of Han. Wei's actions triggered widespread condemnation and became the subject of criticism in later times. Wei's actions not only harmed its own interests, but also undermined international relations, becoming a lesson in history. Later, this was often used as an example to illustrate that in the face of injustice, one should not stand idly by, but should stand up and uphold justice.
Usage
常用来形容对事情不闻不问，置之不理的态度。
Often used to describe an indifferent attitude towards things, ignoring them.
Examples
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面对灾难，有些人坐视不理，漠不关心。
miàn duì zāi nàn, yǒuxiē rén zuò shì bù lǐ, mò bù guānxīn
Some people stand idly by in the face of disaster, indifferent.
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面对同事的求助，他却坐视不理，让人寒心。
miàn duì tóngshì de qiúzhù, tā què zuò shì bù lǐ, ràng rén hánxīn
He ignored his colleague's request for help, which is chilling.
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面对学生的错误，老师不该坐视不理，而应及时纠正。
miàn duì xuésheng de cuòwù, lǎoshī bù gāi zuò shì bù lǐ, ér yīng jíshí jiūzhèng
Teachers should not ignore students' mistakes, but should correct them in time.