| Vendor | Spec | Unit | Price | Currency | Date |
|---|---|---|---|---|---|
| Yuncheng NorthCopper | China national standards | MT | USD | 20250401 | |
| Handan ZONGHENG | China national standards | MT | USD | 20250401 | |
| Huludao Zinc | China national standards | MT | USD | 20250401 | |
| Hunchun Zijin | China national standards | MT | USD | 20250401 | |
| HLJ Zijin Copper | China national standards | MT | USD | 20250401 | |
| JL Longyuanqi | China national standards | MT | USD | 20250401 | |
| Jilin Dadi | China national standards | MT | USD | 20250401 | |
| Panjin Haoye | China national standards | MT | USD | 20250331 | |
| Zhuzhou Smelter | China national standards | MT | USD | 20250331 | |
| Huangshi Daye | China national standards | MT | USD | 20250331 |
