| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.14 | USD | 20250816 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.14 | USD | 20250815 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.22 | USD | 20250814 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.19 | USD | 20250813 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 175.03 | USD | 20250812 |