| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Zhongke Taihua New Material Co., Ltd. | China national standards | MT | 281.27 | USD | 20250922 |
| Shandong Zhongke Taihua New Material Co., Ltd. | China national standards | MT | 281.18 | USD | 20250920 |
| Shandong Zhongke Taihua New Material Co., Ltd. | China national standards | MT | 281.18 | USD | 20250919 |
| Shandong Zhongke Taihua New Material Co., Ltd. | China national standards | MT | 281.35 | USD | 20250918 |