| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Sendi Environmental Protection Technology Co., Ltd. | China national standards | MT | 352.87 | USD | 20251124 |
| Hebei Junshen Environmental Technology Co., Ltd. | 800 VOCs | MT | 423.45 | USD | 20251124 |
| Henan Kaijie Water Treatment Co., Ltd. | 1000 VOCs | MT | 1241.62 | USD | 20251123 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.64 | USD | 20251123 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.64 | USD | 20251123 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.64 | USD | 20251123 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 324.51 | USD | 20251123 |
| Henan Kaijie Water Treatment Co., Ltd. | 1000 VOCs | MT | 1241.62 | USD | 20251122 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.64 | USD | 20251122 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | 1000 VOCs | MT | 634.92 | USD | 20251122 |