Correct

开绿灯

/ kāilǜdēng / 
Strokes

Definition

to give the green light/to give the go-ahead

Example

As a Verb

give sb the green light; give the go-ahead

1
Guānliáo
官僚
zhǔyì
主义
zǒngshì
总是
wéi
为
fǔbài
腐败
dà
大
kāi
开
lǜdēng
绿灯
  
。

Bureaucracy always gives the green light to corruption.