| Vendor | Spec | Unit | Price | Currency | Date |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 632.45 | USD | 20250926 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 633.29 | USD | 20250925 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 605.15 | USD | 20250925 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 605.15 | USD | 20250924 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 633.29 | USD | 20250924 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 633.29 | USD | 20250923 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 605.15 | USD | 20250923 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 633.04 | USD | 20250918 |