1, central enterprises. China youyan technology group co., ltd (formerly Beijing nonferrous metals research institute, hereinafter referred to as youyan group) was established in 1952, and is directly under the central enterprise of the State Council state-owned assets supervision and administration commission.
2. Large scale. Youyan Technology Group Co., Ltd. is a research and development and high-tech industry cultivation institution with large scale and strong comprehensive strength in China nonferrous metals industry.