| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Qingmai Environmental Protection Technology Co., Ltd. | China national standards | MT | 791.42 | USD | 20251201 |
| Hebei Junshen Environmental Technology Co., Ltd. | 700 VOCs | MT | 325.05 | USD | 20251201 |
| Henan Sendi Environmental Protection Technology Co., Ltd. | 1000 VOCs | MT | 635.96 | USD | 20251201 |
| Henan Kaijie Water Treatment Co., Ltd. | 1000 VOCs | MT | 1243.66 | USD | 20251201 |
| Henan Leavit Chemical Technology Co., Ltd. | 600 VOCs | MT | 353.31 | USD | 20251201 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.9 | USD | 20251130 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.9 | USD | 20251130 |
| Henan Huiyihai Water Purification Materials Co., Ltd. | China national standards | MT | 211.9 | USD | 20251130 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 324.91 | USD | 20251130 |
| Henan Kaijie Water Treatment Co., Ltd. | 1000 VOCs | MT | 1243.13 | USD | 20251130 |