| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Qingmai Tech | Industrial Grade | MT | 410.27 | USD | 20251211 |
| Henan Qingmai Tech | Industrial Grade | MT | 409.88 | USD | 20251210 |
| Henan Qingmai Tech | Industrial Grade | MT | 409.76 | USD | 20251209 |
| Henan Qingmai Tech | Industrial Grade | MT | 409.81 | USD | 20251208 |
| Henan Qingmai Tech | China national standards | MT | 409.9 | USD | 20251205 |
| Henan Qingmai Tech | Industrial Grade | MT | 409.99 | USD | 20251204 |
| Henan Qingmai Tech | China national standards | MT | 409.87 | USD | 20251203 |
| Henan Qingmai Tech | Industrial Grade | MT | 409.64 | USD | 20251202 |
| Henan Qingmai Tech | Industrial Grade | MT | 409.84 | USD | 20251201 |
| Henan Qingmai Tech | Industrial Grade | MT | 409.67 | USD | 20251128 |