Correct

关防

/ guānfáng / 
Strokes

Definition

security measures (esp. border security)/official seal (esp. military seal during Qing and Ming times)

Example

As a Noun

measures to forestall leakage of secrets

1
Guānfáng
关防
yánmì
严密
  
。

Strict measures were taken to forestall leakage of secrets.

As a Noun

government/army seal

As a Noun

military position at strategic border point