On this day 38 years ago, on September 14, 1987 (July 22, 1987 lunar calendar), China's first email. At 21:07 on September 14, 1987, China's first email was sent from Beijing to Germany "Crossing the Great Wall and going to the world." It was sent on September 14, 1987 and received on September 20. The industry generally believes that the first email in our country was sent by Mr. Qian Tianbai, a researcher at the Beijing Institute of Computer Application Technology, on September 14, 1987. It is also known as sent on September 20. According to the email records, it was sent on September 14 and received on September 20. It took 6 days at that time! Screenshot of China's first email In the summer of 1987, Professor Cueun attended the third CASCO conference in Beijing. From September 4th to 14th, a total of 11 days, Professor Cueun's team completed the modification of the Siemens 7760/BS2000 host in the ICA at the operating system level, and solved all the software problems of the Sino-German mail exchange. On September 14th, they jointly drafted an email that read: "AcrosstheGreatWallwecanreacheverycornerintheworld" (Crossing the Great Wall, we can reach every corner of the world) "ThisistheFirstElectronicMailfromChinatoGermany" (This is the first email from China to Germany), with the title and content written in both English and German, which is later known as "Crossing the Great Wall, Going to the World" email. In addition to Professor Wang Yunfeng and Professor Cuoen, 11 people from both China and Germany participated in the work on the email, including Director Li Chengjiong, who played an important role in the project. Although the two sides had solved all the problems at that time, there was a problem on the CSNET mail server - a bug in the PMDF protocol caused an infinite loop, which delayed the successful delivery of the email. After consultation and confirmation by the CSNET Information Center: This problem has always existed, especially when the phone line is not good. Professor Cuoen's assistant, Michael Finken, worked with Gerd Wacker, who stayed at Karlsrue, in Beijing to overcome various obstacles such as working hours and use software to make up for the signal confusion caused by the unstable line. Seven days later, on September 20, the email finally traveled halfway around the world to Germany.