On November 26, Henan Kaijie Water Treatment Co., Ltd.'s quotation for coal-based powder activated carbon is 3500 yuan/ton. The specifications of the coal-based powder activated carbon include: domestic product with an iodine value of 500 and a standard set by Henan Kaijie Water Treatment Co., Ltd., enterprise standard 500 6. The validity period of this quotation is 7 days. The provider of the quoted price is Henan Kaijie Water Treatment Co., Ltd.