| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.21 | USD | 20250825 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.79 | USD | 20250825 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 322.49 | USD | 20250824 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.32 | USD | 20250824 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 210.32 | USD | 20250824 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 210.32 | USD | 20250823 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 322.49 | USD | 20250823 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.32 | USD | 20250823 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.32 | USD | 20250822 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 322.49 | USD | 20250822 |