On December 4th, Henan Kaijie Water Treatment Co., Ltd.'s quotation for coal powder activated carbon is $4500 per ton. The specifications of the coal powder activated carbon are: domestic, 325 mesh, Henan Kaijie Water Treatment Co., Ltd., enterprise standard, new standard 700, 120. The validity period of this quotation is 7 days. The quoting party is Henan Kaijie Water Treatment Co., Ltd.