| Vendor | Spec | Unit | Price | Currency | Date |
| Nantong Zhonghe Chemical New Material Co., Ltd. | China national standards | MT | 717.24 | USD | 20250922 |
| Nantong Zhonghe Chemical New Material Co., Ltd. | China national standards | MT | 717.02 | USD | 20250919 |
| Nantong Zhonghe Chemical New Material Co., Ltd. | China national standards | MT | 717.45 | USD | 20250918 |