It is stipulated that male soldiers in the army and air force should wear boat-shaped hats in summer, and male soldiers in the navy should wear large hats without eaves (commonly known as sailor hats) after 1955+00 June 1. However, this kind of military hat, which is popular internationally, is "unaccustomed" in China. First, American soldiers and Kuomintang soldiers wore boat-shaped hats askew, and everyone was disgusted.

1958, the enlarged meeting of the central military commission decided to modify the style of military uniforms, and made it clear that the soldiers of the army and air force canceled the boat-shaped hats and changed them to liberation hats.