| Vendor | Spec | Unit | Price | Currency | Date |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 1126.63 | USD | 20250909 |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 1125.75 | USD | 20250905 |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 970.61 | USD | 20250902 |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 1125.35 | USD | 20250902 |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 1125.62 | USD | 20250901 |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 1121.09 | USD | 20250819 |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 1120.17 | USD | 20250812 |
| Qinghai Yanhu Industry Co., Ltd. | China national standards | MT | 967.13 | USD | 20250807 |