| Vendor | Spec | Unit | Price | Currency | Date |
| Binzhou Dayou Energy | China national standards | MT | 660.08 | USD | 20251205 |
| Binzhou Dayou Energy | China national standards | MT | 660.23 | USD | 20251204 |
| Shandong Zhiheng | China national standards | MT | 660.23 | USD | 20251204 |
| Shandong Zhiheng | China national standards | MT | 660.03 | USD | 20251203 |
| Shandong Zhiheng | China national standards | MT | 659.66 | USD | 20251202 |
| Binzhou Dayou Energy | China national standards | MT | 659.66 | USD | 20251202 |
| Shandong Zhiheng | China national standards | MT | 659.99 | USD | 20251201 |
| Binzhou Dayou Energy | China national standards | MT | 659.99 | USD | 20251201 |
| Wuhan Hengjiu Chem | China national standards | MT | 659.71 | USD | 20251128 |
| Shandong Zhiheng | China national standards | MT | 659.8 | USD | 20251127 |