On November 11, Henan Kaijie Water Treatment Co., Ltd.'s quotation for coal-grade powdered activated carbon is 4300 yuan per ton. The specifications of the coal-grade powdered activated carbon are: domestic, iodine value 600, Henan Kaijie Water Treatment Co., Ltd., enterprise standard, 600, 6. The validity period of this quotation is 7 days. The quoting party is Henan Kaijie Water Treatment Co., Ltd.