| Vendor | Spec | Unit | Price | Currency | Date |
| Kunming Nandian | 85% | MT | 932.56 | USD | 20251209 |
| Kunming Nandian | 85% | MT | 947.22 | USD | 20251204 |
| Kunming Nandian | 85% | MT | 946.41 | USD | 20251202 |
| Kunming Nandian | 85% | MT | 946.38 | USD | 20251126 |
| Kunming Nandian | 85% | MT | 945.98 | USD | 20251125 |
| Kunming Nandian | 85% | MT | 916.77 | USD | 20251105 |
| Kunming Nandian | 85% | MT | 895.88 | USD | 20251031 |