| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Changyi Petrochemical Co., Ltd. | China national standards | MT | 848.03 | USD | 20250922 |
| Shandong Changyi Petrochemical Co., Ltd. | China national standards | MT | 850.58 | USD | 20250919 |
| Shandong Changyi Petrochemical Co., Ltd. | China national standards | MT | 851.09 | USD | 20250918 |