On this day, 40 years ago, on May 8, 1985 (March 19, 1985, the first developed "computer-laser Chinese character editing and typesetting system" passed the appraisal. On May 8, 1985, the first "computer-laser Chinese character editing and typesetting system" successfully developed by China officially passed the national-level appraisal in Beijing. The successful development of this system is a major technological revolution in the history of the development of printing technology in China. It marks that movable type typesetting invented by China and passed down for thousands of years will enter a new era in which it will be replaced by modern advanced technology. The computer-laser Chinese character editing and typesetting system is a national key scientific research project. It was hosted by the Computer Management Bureau of the former Ministry of Electronics Industry and successfully developed by some units in Beijing, Shandong, Wuxi and other places. This is the laser phototypesetting machine (right) of the computer-laser Chinese character editing and typesetting system. It integrates machine, light and electricity to output phototypesetting negatives that meet printing requirements. Detail printer (left), which can print the required format on ordinary paper.