In 1988, the Pascal program written by Lei Jun during his freshman year at Wuhan University was incorporated into the freshman textbook during his sophomore year. In 1989, during the second semester of the sophomore year, Lei Jun wrote an RI (RAMinit, a small tool for clearing memory), which was used by people for more than ten years. Later, Lei Jun made this tool software completely free, and opened the source code, which is also regarded as the first batch of open source free software in China. In the same year, Lei Jun and Wang Quanguo cooperated to write the encryption software BITLOK. This software has been upgraded many times in the following years, and users include the well-known software companies UFIDA, Chaoxiang, Jinshan and so on. According to Lei Jun’s own estimation, the software encrypted with BITLOK has been used on more than one million computers, and Lei Jun also earned his first pot of gold with this software. In 1990, Lei Jun and Feng Zhihong (a well-known shareware author in China, known as the “father of Chinese tool software development”) jointly developed the Immune 90 antivirus software, one of the earliest domestic antivirus software. Lei Jun won the first prize of scientific and technological achievements in Wuhan University with his own anti-virus software of “Immunity 90”, and was specially invited by the Public Security Department of Hubei Province to give lectures and teach anti-virus technology. Around 1990, Lei Jun spent about two weeks deciphering the popular Chinese word processing software WPS1.0 at the time, and made some enhancements and improvements on the original basis. Soon after, the WPS version decrypted by him became the most popular in China. The WPS version. In early 1992, Lei Jun entered the Zhuhai R&D department of Kingsoft as an intern. In July, he formally joined Kingsoft. On August 15th, the Beijing Development Department of Kingsoft led by Lei Jun was established. He was mainly responsible for the technical support of WPS Hancard and participated in the planning of Kingsoft Future 3. Products from 1 to 5 years. In the same year, Lei Jun and Jinshan boss Qiu Bojun (the ancient god of the Chinese software industry, who developed the first version of WPS by himself) jointly wrote the book “Deep DOS Programming” officially published. In May 1993, Lei Jun participated in the research and development of Jinshan VI Hanka and WPS-NT, which are widely used in the industry, greatly improving office efficiency and work quality, and the market share is as high as 90%. From 1993 to 1995, Lei Jun participated in Jinshan “Pangu Project” (the predecessor of WPS Office) and was responsible for the development of Shuangcheng electronic watches (benchmarking excel). In 1995, Lei Jun used his vacation time (about 2-3 months) to completely rewrite BITLOK 3.0 (about 30,000 lines of code before the revision). Based on the original experience, he used some breakthrough technologies to completely solve the past Various questions raised by users. From 1995 to 1997, Lei Jun led the team to complete the development of WPS97. This software finally sold 30,000 sets of genuine copies. After 1997, Lei Jun began to transform into the field of enterprise management more comprehensively. In 1998, 28-year-old Lei Jun became the general manager of Jinshan. At that time, Lei Jun was the general manager during the day and continued to write programs at night to improve his technical level. Immediately after that, the accident of “A new colleague from Jinshan formatted Lei Jun’s computer” happened, Lei Jun had to focus all his energy on management. In 2000, the book “In-depth Windows Programming” written by Lei Jun was officially published. In 2002, under the leadership of Lei Jun, more than 100 engineers lasted for 3 years, abandoned the program architecture accumulated for more than ten years, and overturned and rewritten more than 5 million lines of code, in order to reduce user learning costs and respect user habits. A product that is fully compatible with Microsoft WPS 2005. If Lei Jun at that time continued to write code, perhaps China would lose one of the world’s top 500 entrepreneurs and one more industry’s top programmer god.