Correct

关口

/ guānkǒu / 
Strokes

Definition

pass/gateway/(fig.) juncture

Example

As a Noun

strategic pass; checkpoint

1
Bǎshǒu
把守
guānkǒu
关口

guard a pass

2
Yīdào
一道
  
/
gè
个
guānkǒu
关口

a checkpoint

As a Noun

key point; juncture