Correct

变心肠

/ biàn xīn cháng / 
Strokes
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Collocation

1
翻脸无情变心肠
2
不会变心肠
3
担心某人变心肠
4
暴富以后变心肠

Definition

变心肠:

Literally means:

change of heart

Actually means:

It means one ceases to love or be faithful to someone whom he or she used to love. Derogatory.

改变原有的爱或忠诚。指男女之间的爱情出了问题。具有贬义色彩。

Example

Used as predicate or object. (作谓语、宾语)
1
Tā
他
xiǎng
想
  
,
tā
她
yàoshi
要是
yīnwèi
因为
yī
一
diǎn
点
xiǎoshì
小事
ér
而
fānliǎn
翻脸
biàn
变
xīncháng
心肠
  
,
zhènghǎo
正好
shuōmíng
说明
tā
她
shì
是
yī
一
gè
个
bù
不
zhíde
值得
zìjǐ
自己
ài
爱
de
的
rén
人
  
。

He thought that if she turned her back on a little thing, it just showed that she was not worthy of her love.

2
Tā
他
duì
对
tā
她
de
的
ài
爱
shì
是
zhēnchéng
真诚
hé
和
zhuānyī
专一
de
的
  
,
nǐ
你
bùbì
不必
dānxīn
担心
tā
他
chūguó
出国
yǐhòu
以后
huì
会
biàn
变
xīncháng
心肠
  
。

His love for her is sincere and single-hearted, and you needn't worry that he will change his mind when he doesn't go abroad.

3
Yǒuxiē
有些
nánrén
男人
bàofù
暴富
yǐhòu
以后
jiù
就
biàn
变
xīncháng
心肠
  
,
nàxiē
那些
bāo
包
èr
二
nǎi
奶
de
的
bù
不
dōu
都
shì
是
zhèyàng
这样
ma
吗
  
?

Some men become rich and then change their hearts, those who pack two milks are not all like this?