| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1653.73 | USD | 20251205 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1653.03 | USD | 20251127 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1736.41 | USD | 20251107 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1733.64 | USD | 20251017 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1449.72 | USD | 20251010 |