| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Qingmai Tech | China national standards | MT | 239.37 | USD | 20251014 |
| Henan Qingmai Tech | China national standards | MT | 239.41 | USD | 20251013 |
| Henan Qingmai Tech | China national standards | MT | 239.27 | USD | 20251011 |
| Henan Qingmai Tech | China national standards | MT | 239.27 | USD | 20251010 |
| Henan Qingmai Tech | China national standards | MT | 239.09 | USD | 20251009 |
| Henan Qingmai Tech | China national standards | MT | 239.25 | USD | 20250930 |
| Henan Qingmai Tech | China national standards | MT | 239.14 | USD | 20250929 |
| Henan Qingmai Tech | China national standards | MT | 238.93 | USD | 20250928 |