Enterprise groups are based on public ownership, led by famous brand high-quality products or major products in the national economy, dominated by one or several large and medium-sized backbone enterprises and independent scientific research and design units, and composed of multiple enterprises and scientific research and design units with internal economic and technological links; It plays an important role in the production and operation activities of a certain industry or a certain type of products or in the national economy. It has strong scientific research and development ability and comprehensive functions such as scientific research, production, sales, information and service.. Enterprise group is based on public ownership and led by famous brand high-quality products or major products in the national economy or major products in the national economy.