| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.36 | USD | 20250921 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.89 | USD | 20250921 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.89 | USD | 20250920 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.36 | USD | 20250920 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 210.89 | USD | 20250920 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | China national standards | MT | 210.89 | USD | 20250919 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.36 | USD | 20250919 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 210.89 | USD | 20250919 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 211.01 | USD | 20250918 |
| Henan Huiyihai Environmental Protection Technology Co., Ltd. | 300 VOCs | MT | 323.56 | USD | 20250918 |