Correct

好心不得好报

/ hǎo xīn bù dé hǎo bào / 
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/好心不得好报-Chinese-idioms-Cchatty-0b1201e8-f87a-48f9-9bb6-74790f5bb7fe-1612776901.jpg

Collocation

1
谁知好心不得好报
2
真是好心不得好报
3
这叫好心不得好报

Definition

好心不得好报

Literally means:

good intentions are repaid by evil

Actually means:

It means that treating other people with a good intention ends up without good return for that. It usually implies the speaker's complaint.

好心对待别人,却没有得到好的回报。通常含有埋怨的口气。

Example

Used as predicate or object, and can have other words in between. (作谓语、宾语,中间可插入别的词语)
1
Wǒ
我
hǎoyì
好意
liú
留
tā
他
chī
吃
hǎixiān
海鲜
  
,
méi
没
xiǎngdào
想到
tā
他
chī
吃
de
得
tài
太
duō
多
lādùzi
拉肚子
le
了
  
,
tā
他
lǎopó
老婆
jìng
竟
shuō
说
wǒ
我
cúnxīn
存心
hài
害
tā
他
  
,
zhè
这
zhēn
真
shi
是
hǎorén
好人
zuò
做
bùdé
不得
  
,
hǎoxīn
好心
bùdé
不得
hǎo
好
bào
报
  
。

I kindly left him to eat seafood, did not expect him to eat too much tummy tuck, his wife actually said that I have the heart to harm him, this is really a good man can not do, good heart can not be good news.

2
Tā
他
jiùrén
救人
shòu
受
le
了
shāng
伤
  
,
shuízhī
谁知
hǎoxīn
好心
fǎnér
反而
bùdé
不得
hǎo
好
bào
报
  
,
yǒurén
有人
shuō
说
tā
他
méiyǒu
没有
zhèngjù
证据
  
,
bùkěn
不肯
ràng
让
tā
他
bàoxiāo
报销
yīyàofèi
医药费
  
。

He saved people hurt, who know good heart but not good news, some people say he has no evidence, refused to let him reimburse medical expenses.

3
Rúguǒ
如果
yǒu
有
mòshēngrén
陌生人
qǐng
请
nǐ
你
dàilù
带路
  
,
nǐ
你
qiānwàn
千万
bùyào
不要
qīngyì
轻易
dāying
答应
  
,
wànyī
万一
zhōng
中
le
了
rénjiā
人家
de
的
quāntào
圈套
  
,
bùdàn
不但
hǎoxīn
好心
bùdé
不得
hǎo
好
bào
报
  
,
hái
还
huì
会
yǐnlái
引来
hěn
很
dà
大
de
的
máfan
麻烦
  
。

If there are strangers ask you to lead the way, you must not easily agree, in case of someone else's trap, not only good-hearted good news, but also lead to a lot of trouble.