| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1014.82 | USD | 20250730 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1013.83 | USD | 20250729 |
| Shandong Qiancheng New Materials Co., Ltd. | China national standards | MT | 1014.45 | USD | 20250728 |