| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.65 | USD | 20250907 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.08 | USD | 20250907 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.08 | USD | 20250906 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.65 | USD | 20250906 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.08 | USD | 20250906 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 211.08 | USD | 20250905 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.08 | USD | 20250905 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.65 | USD | 20250905 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.11 | USD | 20250904 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.71 | USD | 20250904 |