To discard people once they have served their purpose; to abandon useful tools or personnel after a task is completed, similar to 'once the birds are gone, the bow is put away'.
他帮助公司度过难关，没想到事情一成功，就被“鸟得弓藏”了。
He helped the company through tough times, but unexpectedly, once the project was successful, he was discarded just like a bow after the birds were caught.
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