Cesium is an alkali metal and has a wide range of uses. Industrial use: Cesium is mainly used to manufacture photoelectric tubes, spectrometers, scintillation counters, radio tubes, military infrared signal lamps, and various optical instruments and detection instruments. Medical use: Cesium salts can be used as anti-shock agents after taking arsenic-containing drugs; the cesium isotope cesium-137 can be used to treat cancer; cesium-137 can be used as a radiation source for sterilization of medical devices, cancer treatment, and flaw detection of industrial equipment. Heating technology field: When cesium heats and illuminates specific areas in an inertial confinement fusion reactor, it can produce high-energy physical reactions and effectively drive the reaction of the reactor. In addition, cesium also has applications in the field of drug efficacy. Cesium has good radioactivity and can be used as a radiotherapy drug for the treatment of malignant tumors. Cesium radiation can effectively kill cancer cells and is also used in EST imaging equipment, a unique oligopoly in the world.