| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.72 | USD | 20251011 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.12 | USD | 20251011 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.12 | USD | 20251010 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.72 | USD | 20251010 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.12 | USD | 20251010 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 210.96 | USD | 20251009 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.48 | USD | 20251009 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.96 | USD | 20251009 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.1 | USD | 20251008 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.69 | USD | 20251008 |