回心转意 change one's mind
Explanation
指改变原来的想法或态度，重新考虑，通常指态度从不好变好。
Refers to changing one's original thoughts or attitudes, reconsidering, usually refers to the attitude changing from bad to good.
Origin Story
话说三国时期，蜀汉丞相诸葛亮病逝后，蜀国大将魏延因与长史杨仪不和，在军中闹事，险些酿成大祸。杨仪多次上书，希望魏延能够回心转意，放下成见，共同为蜀国效力，可惜魏延依旧我行我素，最终导致兵败身亡。这个故事告诉我们，人要懂得变通，不能一错再错。
In the Three Kingdoms period, after the death of Zhuge Liang, the prime minister of Shu Han, the Shu general Wei Yan made trouble in the army because of his disagreement with the Changshi Yang Yi, and almost caused a major disaster. Yang Yi wrote several times, hoping that Wei Yan would change his mind, put aside his prejudices, and work together for Shu, but unfortunately, Wei Yan remained obstinate, which ultimately led to the defeat and death of his army. This story tells us that people should know how to compromise, and not make mistakes again and again.
Usage
用于描写一个人改变原来的想法或态度，通常是消除了误解或矛盾后，重新考虑，并采取新的行动。
Used to describe a person changing his or her original thoughts or attitudes, usually after misunderstandings or contradictions have been eliminated, and to reconsider and take new actions.
Examples
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他终于回心转意，不再坚持错误的意见了。
tā zhōngyú huí xīn zhuǎn yì, bù zài jī chí cuòwù de yìjiàn le.
He finally changed his mind and no longer insisted on the wrong opinion.
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经过多次劝说，他最终回心转意，决定放弃报复计划。
jīngguò duō cì quǎnshuō, tā zuìzhōng huí xīn zhuǎn yì, juédìng fàngqì bàofù jìhuà
After many persuasions, he finally changed his mind and decided to give up the revenge plan..