| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1030.55 | USD | 20251107 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1028.91 | USD | 20251017 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1027.47 | USD | 20251010 |