事過境遷

shìguòjìngqiān

The affair is over and the situation has changed; The incident is over and the circumstances are different.

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shi4 guo4 jing4 qian1

The issue is in the past, and the situation has changed (idiom)., It is water under the bridge.

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事過境遷|事过境迁 [shì guò jìng qiān] ► The issue is in the past, and the situation has changed (idiom). ► It is water under the bridge.