The outer ring of the coin is brass alloy, and the inner core is nickel tape composite copper material, which has unique machine-readable characteristics. The outer edge of the coin is distributed with staggered inclined full teeth and half teeth. When the coin is tilted at an appropriate angle, the invisible figure "100" can be observed on the color band below the back. On the petals on the back of the coin, miniature characters "J", "D", "B" and "N" can be observed.
Commemorative coins are currencies issued to commemorate major events, outstanding figures and places of interest in China's politics, history and culture, including ordinary commemorative coins and precious metal commemorative coins. Both commemorative coins have the nature of legal tender, can circulate with RMB, and also have good collection and commemorative significance.