On November 4, Henan Kaijie Water Treatment Co., Ltd.'s quoted price for Gulkao activated carbon is 4800 yuan per ton. The specification of Gulkao activated carbon includes domestic products with an iodine value of 300, produced by Henan Kaijie Water Treatment Co., Ltd., in accordance with the enterprise standards, and priced at 300 yuan per ton. This quote is valid for a period of seven days. The quote is provided by Henan Kaijie Water Treatment Co., Ltd.