What is the difference between wheat ears and no wheat ears on the brim of China People's Liberation Army military hat?

The main difference between the China People's Liberation Army cap with and without wheat ears is that it represents different services.

There are ears of wheat on the brim of PLA military hat, because the army is the main service of China People's Liberation Army, and the ears of wheat on the brim represent the army.

There are no wheat ears on the brim of the PLA Navy hat, because the navy is one of the main services of the China People's Liberation Army, and there are no wheat ears on the brim to represent the navy.

There are no wheat ears on the brim of the China People's Liberation Army Air Force hat, because the Air Force is one of the main services of the China People's Liberation Army, and there are no wheat ears on the brim to represent the Air Force.

It should be noted that whether there are ears of wheat on the brim of the military hat of the China People's Liberation Army does not represent its service.