Yunnan Yiji Taigong is a state-owned holding enterprise jointly funded by Taiyuan Heavy Industry Co., Ltd. and Yunnan Machinery Import and Export Co., Ltd., mainly engaged in the research, development, production and sales of hydraulic components and hydraulic systems.

Yunnan No.1 Machine Tool Group (Yunnan Machine Tool Works) is a wholly-owned subsidiary of Kunming Machine Tool Co., Ltd., mainly engaged in machine tool manufacturing and sales. Although they are all located in Yunnan Province, there are obvious differences in business fields and management systems.