On October 10th, Changzhou Qinghong Chemical Co., Ltd. provided a quotation for sulfuric acid at the rate of 650 yuan per ton. The specifications of the sulfuric acid are as follows: grade: qualified product; quality percentage/% ≥: 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.