On this day, 27 years ago, June 2, 1998 (May 8, 1998, the lunar calendar), China and the United States joined hands to create a new era of antimatter detection in the human universe. On June 2, 1998, at 6:10 pm EDT (6:10 am Beijing time on June 3), at the Kenddy Space Launch Center in Florida, USA, the first powerful magnetic spectrometer in human history-Alpha Magnetic Spectrometer (AMS) was sent into space by the U.S. space shuttle Discovery to detect antimatter and dark matter in space and measure the elemental composition of the universe. This is a major cross-world scientific research project of mankind and the first major cooperation in space technology between China and the United States. For many years, humans have been using light to observe the universe, including visible light, radio waves, microwaves, X-rays and Y-rays. Bringing the alpha magnetic spectrometer AMS into space is the first time that humans have directly observed charged particles in space. It has opened up a new scientific field and is likely to bring a new major breakthrough in physical science. The AMS experimental project, which has lasted for more than two years, is a large-scale international cooperative scientific experimental project led by Ding Zhaozhong, a well-known Chinese-American physicist, Nobel Prize winner, and professor at the Massachusetts Institute of Technology. It includes the participation of physicists and engineers from 37 research institutions in more than 10 countries and regions, including the United States, China, Russia, Italy, Switzerland, Germany and other countries. The Institute of Electrical Engineering of China Academy of Sciences, the Institute of High Energy Physics, the Space Center and China Academy of Launch Vehicle Technology participated in the program and played a key role in it in cooperation with NASA. It is understood that after the first flight of the AMS magnetic spectrometer in June this year, it will begin to enter the second phase of the project: on the basis of improving the main detector already built in the first phase of the project, a number of new sub-detectors will be added to further improve Measurement accuracy, expand detection range, and reduce systematic errors. On January 19, 2002, it will be transported by the space shuttle to the "International Space Station" jointly developed by the United States, Russia, Western Europe, Japan and Canada. It is planned to operate for 3-5 years. To this end, my country's Ministry of Science and Technology, the National Natural Science Foundation of China and China Academy of Sciences have planned to provide strong financial support to Chinese units. The AMS experiment is a major cross-century international scientific experimental project. This cooperation between China and the United States is of extremely great significance in strengthening scientific and technological exchanges between China and the United States and promoting the friendship and common development of the two peoples. It will surely have a profound impact on the scientific and technological communities of China and the United States. In the future, China and the United States will also carry out more extensive cooperation in the AMS program, the Carrying Barrel Program (using NASA's space shuttle carrying barrels to conduct a series of space science experiments) and other aerospace technology fields. It is expected that the successful cooperation between China and the United States on the AMS project will become a new era of joint cooperation, joint development and common progress between China and the United States and European countries in the field of aerospace technology.