轉面無情

Simplified: 转面无情

zhuǎnmiànwúqíng ㄓㄨㄢˇ ㄇㄧㄢˋ ㄨˊ ㄑㄧㄥˊ

    • to turn one's face against sb and show no mercy (idiom) to turn against a friend

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Sources