Correct

堵后门

/ dǔ hòu mén /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/堵后门-Chinese-idioms-Cchatty-4a814570-1d7d-4a92-b068-d0807efbd424-1612776794.jpg

Collocation

1
堵后门的办法
2
必须堵住走私的后门
3
严严实实地堵住后门

Definition

堵后门

Literally means:

block the back door

Actually means:

prevent illegal business dealing

It means blocking illicit access or preventing illegal business dealing.

堵塞违反规定办事的门路或途径。

Example

Used as predicate, object or attributive. It can be used with other words in between orUsed in an inverted order. (作谓语、宾语、定语,中间可以插入别的词语,也可倒装使用)
1
guó
各国
zhèng
政府
kào
依靠
hǎiguān
海关
  
,
yányánshishí
严严实实
de
zhù
堵住
le
zǒu
走私
de
hòumén
后门
  

Governments rely on customs to block smuggling back doors.

2
guǒ
如果
néng
xiān
hòumén
后门
le
  
,
jiù
méiyǒu
没有
hòumén
后门
zǒu
le
  

If you could block the back door first, he wouldn't have a back door to go.

3
Yǒurén
有人
rènwéi
认为
  
,
zhāoshēng
招生
kǎoshì
考试
shí
cǎi
采取
tǒng
统一
biāozhǔn
标准
  
,
guǎn
不管
shénme
什么
rén
dōu
zhàogu
照顾
  
,
zhè
shì
hòumén
后门
de
zuì
hǎo
bàn
办法
  

Some people think that the admission examination to adopt a uniform standard, no matter who does not take care of, this is the best way to block the back door.