On October 23, Changzhou Qinghong Chemical Co., Ltd. provided a quotation for sulfuric acid at the rate of 750 RMB per ton. The specifications of the sulfuric acid are as follows: grade: qualified; mass fraction of sulfuric acid/% ≥: 98; product grade: industrial-grade; type: concentrated sulfuric acid. The validity period of this quotation is three days. The quoting entity is Changzhou Qinghong Chemical Co., Ltd.