Bismuth has soft texture, low melting point and stable chemical properties, and is commonly used to prepare fusible alloys, such as alloys composed of lead, tin and other metals, which are widely used in fire fighting devices, fuses, thermal elements and other fields. In addition, bismuth and its compounds have important applications in medicine, cosmetics, semiconductor materials, such as bismuth potassium tartrate for the treatment of stomach diseases, bismuth oxychloride is used to make non-toxic cosmetics.