| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Qingmai Tech | Industrial Grade | MT | 408.48 | USD | 20251015 |
| Henan Qingmai Tech | Industrial Grade | MT | 408.33 | USD | 20251014 |
| Henan Qingmai Tech | Industrial Grade | MT | 408.41 | USD | 20251013 |
| Henan Qingmai Tech | China national standards | MT | 408.17 | USD | 20251011 |
| Henan Qingmai Tech | Industrial Grade | MT | 408.17 | USD | 20251010 |
| Henan Qingmai Tech | Industrial Grade | MT | 407.86 | USD | 20251009 |
| Henan Qingmai Tech | Industrial Grade | MT | 408.13 | USD | 20250930 |
| Henan Qingmai Tech | Industrial Grade | MT | 407.94 | USD | 20250929 |
| Henan Qingmai Tech | Industrial Grade | MT | 407.58 | USD | 20250928 |
| Henan Qingmai Tech | Industrial Grade | MT | 407.58 | USD | 20250926 |