Introduction to the top hat with flower feathers: The Qing Dynasty changed the imperial crown of all dynasties to the top hat. The top hat is also called "Dingzi" or "Ting Dai" or "Ting Dai Hua Ling". There are two types of hats, one is a cool hat worn in summer and the other is a warm hat worn in winter. The hat is trumpet-shaped and has no eaves. It is usually made of rattan or bamboo mat, and is wrapped with silk. It is mostly white, lake-colored or yellow, and decorated with red tassel beads. Warm hats are round in shape with a brim. They are mostly made of leather, woolen cloth, satin, or cloth. They are mostly black, with a weft made of red wool in the middle, and a bead on the top of the hat. The different materials and colors of the top beads represent the different grades of officials. The Qing government stipulated that the first grade should be ruby, the second grade should be coral, the third grade should be sapphire, the fourth grade should use lapis lazuli, the fifth grade should use white crystal, and the sixth grade should use clam. The seventh grade is plain gold, the eighth grade is gold with yin patterns, and the ninth grade is engraved gold with yang patterns. In the eighth year of Yongzheng's reign (1730), the crown crown system for officials was changed, with glass of the same color replacing gemstones. Those without crown beads would not have official status.