| Vendor | Spec | Unit | Price | Currency | Date |
| Suzhou Zixu New Materials Co., Ltd. | China national standards | MT | 1518.86 | USD | 20250922 |
| Suzhou Zixu New Materials Co., Ltd. | China national standards | MT | 1518.39 | USD | 20250919 |
| Suzhou Zixu New Materials Co., Ltd. | China national standards | MT | 1519.31 | USD | 20250918 |