The reason why frost forms on the bracelets in Banyin is that the climate in the Banyin area is cold and humid, and the moisture in the air can easily condense into water droplets, thus covering the surface of the bracelets. If the bracelets still have a certain temperature, the moisture on the surface will turn into frost or ice. Similarly, in the cold weather in winter, the surface of modern buildings will also have the same frost and snow phenomenon as the bracelets. In addition, the material or color of artificial bracelets will also affect the frosting situation. Generally, dark or black materials are more likely to absorb the surrounding heat, and are not as evenly distributed as light-colored materials. Moreover, the wooden materials often used for bracelets, especially fir, Yunnan pine and other woods, are extremely sensitive to humidity and will absorb the moisture flowing in the air to cause frost and snow.