On October 23, Henan Kaijie Water Treatment Co., Ltd.'s quotation for coal-based powdered activated carbon is 2400 RMB per ton. The specifications of the coal-based powdered activated carbon are: domestic, iodine value 300, Henan Kaijie Water Treatment Co., Ltd., enterprise standard, 300 4. The validity period of this quotation is 7 days. The quoting party is: Henan Kaijie Water Treatment Co., Ltd.