过河拆桥
guò hé chāi qiáo
to drop people once they’ve served their purpose
Character by character
过guò
cross
cross
河hé
river
river
拆chāi
demolish
demolish
桥qiáo
bridge
bridge
Example
项目一成功，他就过河拆桥，把我们踢开了。
The moment the project succeeded, he kicked us aside.
Tone: negative (criticism).
Usage and origin
Of using people and discarding them.
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