Sino Gem

The story of Sino Gem, or Guoji Jinggong (国机精工), begins not as a jewelry company, but as a state-run industrial research institute. Its earliest predecessor, the Luoyang Bearing Research Institute, was founded in 1958. The focus was on high-precision industrial components like special bearings, machine tools, and testing equipment. This foundation in precision engineering defined the company's trajectory for decades. In 2001, the entity was restructured and formally established as a company. The major turning point came in May 2005, when the company, then known as Luoyang Bearing Research & Science Co., Ltd. (轴研科技), went public on the Shenzhen Stock Exchange. This IPO provided significant capital for growth and development in its specialized industrial sectors. A pivotal event occurred in 2008 when the state-owned giant China National Machinery Industry Corporation (Sinomach Group) acquired the company. This move integrated it into a larger national industrial strategy. Further consolidation happened in 2017 with the acquisition of Sinomach Precision Industry Co., Ltd. (国机精工有限公司), another entity within the same parent group. Finally, in December 2020, the company officially changed its name to Sinomach Precision Industry Group Co., Ltd., or Guoji Jinggong, solidifying its identity as the core precision engineering platform for the Sinomach Group.