Contact the commodity staff in Beijing. Zhongjing commodity is a comprehensive commodity trading market. If Zhongjing commodities are not allowed to be traded, you can contact Zhongjing commodity staff. The goods in Beijing have been fully inspected and strictly demonstrated by experts from all walks of life. Relying on the geographical advantages, industrial resources and scientific and technological advantages of the Central Plains, the Beijing market mainly trades non-ferrous metals, refractories and alloy materials.