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Why are police armbands directing traffic?

The policeman's armband is usually on the right, so you can look at it and judge the position when directing traffic. The national flag armband is located on the left arm of the duty clothing, and the public security armband is located on the right arm of the duty clothing. Adding signs to the uniforms of the people's police in the national entry-exit administration is conducive to timely and accurate identification, consciously obeying and cooperating with law enforcement, and facilitating Chinese and foreign personnel to seek help. It is also conducive to the entry-exit management people's police to actively accept the supervision of the broad masses of the people, constantly enhance their sense of professional honor, and better perform their duties and tasks entrusted by law.