| Vendor | Spec | Unit | Price | Currency | Date |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 393.87 | USD | 20250929 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 393.52 | USD | 20250926 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.05 | USD | 20250925 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.05 | USD | 20250924 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.05 | USD | 20250923 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 393.89 | USD | 20250918 |