On this day, 44 years ago, on February 9, 1981 (January 5, 1981, the lunar calendar), my country's first large-scale high-flux atomic reactor was completed. On February 9, 1981, my country's first large-scale high-flux atomic reactor researched and designed by the Southwest Reactor Engineering Design Institute of the Second Engineering Department was completed and successfully carried out high-power operation. The reactor's thermal power design quota is 125,000 kilowatts, and the maximum thermal neutron flux is 620 trillion neutrons per second per square centimeter. The reactor is a test research reactor with large irradiation capabilities and is equipped with relatively complete process experimental research methods and facilities for extensive reactor engineering test research. It has the characteristics of "multiple uses in one pile" and can simultaneously produce multiple radioactive isotopes and hypercyclic elements. It can also carry out activation analysis of trace elements and technical research and production of monocrystalline silicon neutron transmutation. Its main body and supporting projects have more than 50,000 pieces of equipment, all of which are manufactured by our country itself.