The free electron laser is the most advanced new generation of advanced light sources in the world, and it is also an important direction for the development of advanced countries in the world today. Recently, the "Dalian Light Source" developed by the Chinese Academy of Sciences successfully issued the world's strongest EUV free-electron laser pulse on January 15. A single picosecond laser pulse produces 140 trillion photons, making it the brightest and the wavelength in the world. Adjustable EUV free electron laser light source. According to reports, under the irradiation of such extreme ultraviolet light, almost all atoms and molecules in the region are "untouched." Therefore, "Dalian Light Source" can be used to observe the physical and chemical processes related to combustion, atmosphere and clean energy. For example: energy, optics, physics, biology, materials, atmospheric haze, photolithography, and Other important areas. At present, "Dalian Light Source" is China's first large-scale free electron laser scientific research user device. It is the only free electron laser device operating in the extreme ultraviolet region in the world, and it is also the brightest EUV light source in the world. kaiping aida sanitary ware technology co.,ltd , https://www.kpaidafaucets-jm.com