2. A beret is a circular hat, while an octagonal hat, as its name implies, has eight corners, and an octagonal hat is also called a pumpkin hat. Octagonal hat, also known as "liberation hat", is named because the outer opening of the top of the hat is octagonal. The lower end is connected with a section of hat brim, and there is a half-moon hat tongue in the middle of the front.

3. It was originally the military cap of the Eighth Route Army, and later evolved into a cap suitable for the Spring and Autumn Period. It was worn by more people around the fifties. A soft military cap without eaves is usually used as the personnel symbol of special units, special forces and airborne troops in some countries. Berets have the advantages of being easy to fold, not afraid of squeezing, easy to carry and beautiful, and it is also convenient to put on a helmet.

4. Marshal Montgomery, a famous general, often wore a beret in World War II, and he also wore two caps, the general and the armored force. Some countries distinguish different arms mainly in color. There are clear requirements for wearing berets. Berets can only be worn when wearing uniforms, training uniforms and work clothes.