1953
The Preparatory Office of Lanzhou Petroleum Machinery Works was established.
1955
Lanzhou Refinery and Petrochemical Plant was established.
1958
Lanzhou Petroleum Machinery Works and Lanzhou Refinery and Petrochemical Plant merged to form Lanzhou Petroleum and Chemical Machinery Factory (LS Factory).
2000
Lanzhou LS-National Oilwell Petroleum Engineering Co., Ltd. (LS-NOW), a Sino-American Joint Venture, was established between Lanzhou Petrochemical Machinery Equipment and Engineering Group (LS Group) and National Oilwell International, Inc. (NOV).
2002
Lanzhou LS Group Company Limited was formally established.
2010
Qingdao LS was established and put into operation, significantly enhancing the manufacturing capacity of large-scale pressure vessels.
2013
The project of relocating from the city to the industrial park started.
2013
Lanzhou LS Energy Equipment International Engineering Co., Ltd. was established.
2014
Lanzhou LS Heavy Equipment Co., Ltd. went public (Stock Code: 603169).
2015
Xinjiang LS was established and put into operation, making a strong foray into the field of coal chemical equipment.
2016
LS International Middle East FZE was established.
2017
LS acquired Ruize Petrochemical, achieving a transformation from single equipment manufacturing to system integration services.
2021
LS acquired CNNC Jiahua, achieving a seamless integration across the entire nuclear energy equipment industry chain.
2023
Guangdong LS Ammonia-Hydrogen Energy Equipment Co., Ltd. was established to expand into hydrogen-ammonia-methanol new energy equipment industry.
2025
Gansu Xinghuo Intelligent CNC Machine Tool Co., Ltd. joined LS Group as a subsidiary.