Correct

暗箱操作

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/暗箱操作-Chinese-idioms-Cchatty-748c990e-f243-4f46-8be5-1dee0e9bbaf7-1612777449.jpg

Collocation

1
也作【黑箱操作】
2
暗箱操作的现象
3
禁止暗箱操作
4
防止暗箱操作
5
避免暗箱操作

Definition

暗箱操作:

Literally means:

black case work - manipulation in the dark box; manipulation behind the scenes.

Actually means:

暗箱 is camera obscura, a box-like sun proof device used to reload film.

The operation inside the obscura is not visible because it is impervious to light.

This phrase metaphorically means handling a public affair behind the scenes.

It is often used to refer to what few people with power do behind the scenes to achieve personal benefits.

It carries a derogatory sense.

暗箱,一种防止胶片感光的箱形装置,用来装、 换胶片。

因为密闭不透光,看不到手在里面怎么操作,所以叫暗箱。

暗箱操作,比喻在公共事务中暗中谋划、运作,不让公众知道。

多指少数有权的人为暗中达到谋私目的而进行活动。

具有贬义色彩。

Example

Used as object or attributive. (作宾语、定语)
1
Zhè
这次
zhāobiāo
招标
yìng
bǎozhèng
保证
jìngbiāozhě
竞标者
de
gōngpíng
公平
jìngzhēng
竞争
  
,
juéduì
绝对
yǔn
允许
ànxiāng
暗箱
cāozuò
操作
huò
hòu
幕后
jiāo
交易
  

This tender should ensure fair competition for bidders and will never allow behind-the-scenes operations or behind-the-scenes transactions.

2
Zhèng
政府
gōng
公布
le
xīn
de
xuǎn
选举法
  
,
fángzhǐ
防止
xuǎn
选举
zhōng
de
ànxiāng
暗箱
cāozuò
操作
xiànxiàng
现象
  

The government has announced a new electoral law to prevent covert elections.

3
Yǒurén
有人
zhǐchū
指出
  
,
yīnyuè
音乐
páihángbǎng
排行榜
zhōng
yǒu
gōngpíng
公平
de
xiànxiàng
现象
  
,
yīn
因此
men
我们
yào
fángzhǐ
防止
zhǒng
各种
ànxiāng
暗箱
cāozuò
操作
  

It has been pointed out that there is unfairness in music charts, so we want to prevent all kinds of covert operations.