Usually there is no brim, and it also includes a hat with a half tongue in front. There are mainly 10 species. (1) Soviet hat: a warm hat with a leather top, a flat dome, six flaps and a seam on the brim. Originally worn by farmers or hunters in northern and western Europe. It was introduced into China from the Soviet Union in 1950s. Those without tongues are called Su Shi, and those with tongues are called Ping An Shi. (2) Xinjiang hat: there are four sides on the top, mostly made of colored plain embroidery and bead embroidery. Small and exquisite, it is a traditional Uygur hat. ③ Luo Song hat: cylindrical camel hair hat. There are fluffy balls at the top and uvula at the eyebrows. It was very popular in China in the first half of the 20th century. 4 beret: also known as doctor's hat. Usually a black or dark blue wool hat. ⑤ Red Army hat: a gray flat-bottomed cloth hat with a brim. The top of the hat is octagonal, also called octagonal hat. It was first used by the Chinese Red Army of Workers and Peasants in the 1930s. ⑥ Cap: China was introduced from abroad before the May 4th Movement, so it was named after its duckbill shape. The hat is high at the front and low at the back, also called the front hat. ⑦ Big hat: also known as big hat. It was introduced to China in the late Qing Dynasty. Now it is a military cap of China People's Liberation Army (see military uniform), and it is also used for professional wear. ⑧ Hui people's hat: dome, with high front and short back, mostly made of white bleached cloth or velveteen. There are single and double layers. This is the traditional hat of the Hui nationality. Pet-name ruby felt hat: It looks like a felt hat helmet, with gold embroidery at the top and inlaid decoration at the bottom. There is a small brim in front of the hat, and squirrel hair is embedded in the ear fan. Most of them are worn by Tibetans. Attending chef's hat: dome, four-sided pleats, and wide hoop under it. The higher the chef's hat, the higher the craft, up to 35cm.