| Vendor | Spec | Unit | Price | Currency | Date |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.03 | USD | 20251031 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.12 | USD | 20251030 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.17 | USD | 20251028 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.82 | USD | 20251023 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.62 | USD | 20251022 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.52 | USD | 20251020 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.65 | USD | 20251017 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.54 | USD | 20251016 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.39 | USD | 20251015 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 394.33 | USD | 20251013 |