On November 23, 1999, Chengdu Leejun Industrial Co., Ltd. was officially registered in Chengdu Qingyang District Industrial and Commercial Administration Bureau.

In April 2000, "Cement", "China Building Materials Machinery", "Cement Equipment and Technology" and other magazines first published Leejun’s first generation of products -- DDX multi-feed multi-discharge tray conveyor, improved O-Sepa separator, ZX combined separator and coal mill dynamic separator.
In May 2000, the company signed the first sales contract with a customer from Guiyang.
On July 2, 2000, the company held the start ceremony of base construction and pilot production transformation at YueLiang Wan, No.58 Wenchang Road, Chuqiao Township, Wuhou District, Chengdu.

In July 2001, the company obtained eight national patent certificates.
In August 2001, the company obtained ISO9001 quality management system certificate and "Chengdu High-tech Enterprise" certificate.
In October 2001, the company's largest combined separator sent to the Tunisian site.

In December 2002, the company signed the Project Investment Agreement with the Management Committee of Chengdu Wuhou Science and Technology Park.
In 2002, the company obtained seven national patent certificates.

In 2003, Sichuan Leejun was founded.
In 2003, the company signed a technical cooperation agreement with W.A UK, becoming the only technical cooperation partner of W.A in China.
On June 22, 2003, the company held the foundation laying ceremony at the new site of Wuhou Science and Technology Park, and the plant construction project was fully started.
In July 2003, the first CLF roller press independently developed and manufactured by the company was officially delivered to a customer in Jiangsu province, marking that Leejun's product technology in the field of cement pre-grinding system reached the leading level in China.
In 2003, the company obtained a national patent certificate.
In 2003, the company's intelligent automatic rotary tray conveyor with DDX multi-point material selection and multi-point unloading won "Chengdu Government Science and Technology Progress Award third prize".

On May 6, 2004, the company officially relocated to No. 5 Wuke East Second Road, Wuhou Science Park, marking the rapid development of Leejun.
In 2004, the company obtained three national patent certificates.
In 2004, the first 170 series roller press developed by the company was put into production in Shandong Province.

In 2005, Leejun Roller Press was awarded "Torch Project" by the Ministry of Science and Technology.
In 2005, the company obtained three national patent certificates.
In 2005, the company was awarded the title of "Sichuan Advanced Quality Management Enterprise".

In April 2006, the company won the title of "Top Five Private Science and Technology Enterprises" in Wuhou District.
In May 2006, the company obtained the certificate of "Certificate of Registration of Self-filing Inspection and Quarantine Inspection Units" from Sichuan Entry-Exit Inspection and Quarantine Bureau.
In September 2006, the company was awarded "Advanced Quality Management Enterprise of Sichuan Province" by Sichuan Quality and Technical Supervision Bureau.
In December 2006, the company technology center was identified as "Sichuan Enterprise Technology Center".
In December 2006, "Roller press cement raw material final grinding system" of the company won the national invention patent.

In February 2007, the "Leejun" officially registered as a company trademark.
In September 2007, the Leejun roller press was awarded as "China Famous Brand Products" by the State Administration of Quality Supervision.
In December 2007, the company was awarded the title of "Top 20 Enterprises of China Building Materials Machinery Manufacturing in 2007" and "Leading Enterprise of China Cement Machinery" by China Building Materials Machinery Industry Association.
In December 2007, the company was awarded AAA Certificate of Enterprise Credit Grade by China Building Materials Machinery Industry Association.
In 2007, the company's "Roller press equipment technology research and energy-saving product development" project was awarded "Sichuan Key Technological Innovation Project".
In 2007, the company obtained two national patent certificates.
In 2007, the company's "Separator Rotor" project won the "Chengdu Municipal People's Government Patent Award Silver Award".
In 2007, the company obtained Iso14001:2004 environmental management system certification.

In January 2008, the company won the "High Quality General Contracting Project Award" of Chongqing Lafarge Cement Co., LTD.
In February 2008, the company set up a wholly-owned subsidiary company, "Chengdu Leejun Science and Technology Co., Ltd."
In May 2008, the company's research and development of "Roller Mill Grinding System" was announced by the National Development and Reform Commission No. 36 as "the First Batch of National Key Energy-saving Technology Promotion Projects".
In June 2008, the company won the title of "Outstanding Contribution to Earthquake” in Wuhou District.
In August 2008, the company won "Top Ten Private Industrial Enterprises" in Wuhou district.
In September 2008, the company was awarded the title of "Quality Credit AAA" by Sichuan Quality and Technical Supervision Bureau.
In October 2008, the company was listed as "Key Heavy Equipment Enterprise in Sichuan Province" (the announcement date was December 6, 2008).
In 2008, the company was recognized as "High-tech Enterprise of Sichuan Province".

In July 2009, the registered capital of the company increased to 10 million CNY.
On July 24, 2009, the company completed the registration of the change from "Chengdu Leejun Industrial Limited Liability Corporation" to “Chengdu Leejun Industrial Co. Ltd"
In September 2009, the company's patent of "CLF200160 roller press applied to 5000t/d cement clinker production line" was awarded by Chengdu Economic Committee as "the first batch of Chengdu (set) and key components products".
In September 2009, the company registered trademark (emblem + English + Chinese), registration number: 3070335. And the company was awarded the title of "Chengdu Famous Trademark" by Chengdu Industry and Commerce Bureau.
In 2009, the company's "roller press cements raw material finished grinding system technology research and development" project won the first prize of "China Building Material Machinery Industry Association Third National Building Material Industry Technology Innovation Award".
In 2009, the company's "roller press cement raw material final grinding system" won first prize of "Chengdu Municipal People's Government Science and Technology Progress Award".

In January 2010, the company was awarded the title of "Advanced Collective of Standardization Work in Building Material Machinery Industry 2008-2009" by National Construction Material Industry Machinery Standardization Technical Committee.
In 2010, the company's "Roller Press Remote Service System" project won the first prize of "Pengfei Cup" of China Building Material Machinery Industry Association, the 4th National Building Material Machinery Industry Technology Innovation Award.
In 2010, the company was awarded the title of "Big Taxpayer", "Top Ten Enterprises of Industrial Taxation", "Industrial Enterprises with Over 100 million Tax" and "Key Advantage Enterprises" of Wuhou District.

In January 2011, the company's registered capital increased to 360 million CNY.
In May 2011, the company was awarded the title of "Advanced Collective of Standardization Work in Building Material Machinery Industry in 2010" by the National Construction Material Industry Machinery Standardization Technical Committee.
In June 2011, the company's "High Pressure Roller Press for Fine Chemical Industry (CLF/M52-25)" project won the second prize of "Chengdu Municipal People's Government Science and Technology Progress Award".
In 2011, the company won the title of "Science and Technology Innovation Achievement Award" by China Building Materials Machinery Industry Association, the leading enterprise of building materials machinery industry in the "11th Five-Year Plan".
In 2011, the company won "demonstration project of major scientific and technological achievements transformation project in Sichuan province".
In 2011, the company was awarded "Academician (Expert) Innovation Workstation".

On January 6, 2012, Chengdu Leejun Industrial Co., Ltd (hereinafter referred to as Leejun, code 002651) was listed on Shenzhen Stock Exchange.
In January 2012, the company was selected into the "the list of large cultivated enterprise groups in Chengdu in 2012 ".
In January 2012, the registered capital of the company increased to 401million CNY.
In 2012, the company became JC/T 845-2011 "Roller Press for Cement Industry" building materials industry standard drafting unit.
In 2012, the company won the title of "Advanced Quality Management Enterprise of Sichuan province".
In 2012, the company won the second prize of Sichuan science and technology progress award for its "Large-scale Series of Roller Presses for Magnetite" project.

In August 2013, the company won the title of "Outstanding Private Enterprise in Sichuan province".
In 2013, JC/T 2104-2012 General Technical Conditions for Wear Resistant Surfacing in Cement Industry, which was drafted by the company, was formally implemented since July 1.
In 2013, the project "Application of Stud Surface Roller Press" won the first prize of the 7th National Building Materials Machinery Industry Technology Innovation Award of China Building Materials Machinery Industry Association "Jianfeng Cup".
In 2013, the company's project of "a method of batch processing blind hole on high hardness metal material" won the title of "excellence award of Chengdu patent award".
In 2013, the company's "Technological System Research for Energy Saving and Consumption Reduction of Vanadium Titanium Magnetite High Pressure Roller Mill" project won the second prize of "Chengdu Science and Technology Progress Award".

In June 2014, the company was awarded the title of "Advanced Collective of Standardization Work in Building Material Machinery Industry in 2013".
In September 2014, the company's analysis and testing center was awarded the Laboratory Accreditation Certificate of China National Accreditation Committee for Qualification Assessment.
In 2014, the company won the title of "Top 20 Building Materials Machinery in China ".
In 2014, the company was awarded "Sichuan Post-doctoral Innovation Practice Base".

In March 2015, the project of "development of vibrating boiling dry magnetic separator" of the company won the second prize of Wuhou District Science and Technology Progress Award
In September 2015, the registered capital of the company increased to 1,002.5 million CNY.

In 2016, the company won the title of "outstanding private enterprise of Sichuan province".
In 2016, the company won the First Government Quality Award" in Chengdu.

In January 2017, the company was awarded the title of "Worker Pioneer" by the Chengdu Federation of Trade Unions.

In April 2018, the company participated in the 19th China International Cement Technology and Equipment Exposition to further enhance the reputation and reputation of Leejun brand.
In June 2018, the company participated in drafting "Technical Requirements for Complete Equipment of New Dry Cement Production" GB/T 35150.1-2017 Part 1: Raw Material Preparation System; and participated in drafting "Roller Press for Cement Industry" GB/T 35168-2017.
In July 2018, the company won the title of "Top 50 Machinery Industry Enterprises in Sichuan Province ".
In August 2018, the company participated in the "2018 (9th) China Mining Science and Technology Conference", which further established its corporate image.
In November 2018, the registered capital of the company increased to 1,017.5 million CNY.
In 2018, the company obtained 9 national patents. ……