| Vendor | Spec | Unit | Price | Currency | Date |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.74 | USD | 20251210 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.63 | USD | 20251209 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.68 | USD | 20251208 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.77 | USD | 20251205 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.71 | USD | 20251201 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.6 | USD | 20251127 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.5 | USD | 20251126 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.34 | USD | 20251125 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.06 | USD | 20251121 |
| Zaozhuang Yitai Energy Technology Co., Ltd. | China national standards | MT | 395.17 | USD | 20251118 |