On December 11th, Henan Kaijie Water Treatment Co., Ltd.'s quotation for coal-grade powder activated carbon is 4500 yuan/ton. The specifications of the coal-grade powder activated carbon are: domestic, 325 mesh, Henan Kaijie Water Treatment Co., Ltd., enterprise standard, new standard 700, 120. This quotation is valid for 7 days. The quoting party is Henan Kaijie Water Treatment Co., Ltd.