Thirty years ago today, on May 11, 1995 (April 12, 1995 lunar calendar), the Dawning 1000 large-scale parallel computing system passed the national examination. On May 11, 1995, the "Dawning 1000" large-scale parallel computing system passed the national appraisal. This is another new milestone in the development of China's high-performance computing machine after Yinhe I and Dawning 1. The peak speed of the "Dawning 1000" large-scale parallel computing system is 2.50 billion times per second, and the actual operation speed is 1.58 billion times per second. It can solve the linear equations of 15,000 unknowns, surpassing similar foreign machines in the scale of solving problems. The system breaks through some key technologies of massively parallel processing. The interconnect chip is original, and the parallel optimization compiler is one of the best systems in the world. The system has broad prospects and can solve many problems that are difficult to solve by computers and workstations. For example, it can greatly enhance the ability of oil exploration and natural gas prediction, and can be used for simulation computing to design new aircraft, new materials, new drugs, new catalysts, etc. It can also meet the urgent need for large-scale parallel machines in basic research. The research project won the first prize of the national science and technology progress award in 1997. "Dawning No. 1" large-scale parallel computing machine