On October 27^th, 2011, Deputy General Manager Luan Yuandi and other leaders of Jinan Iron and Steel Group Co., Ltd visit our company and made technical exchanges. TuoFeng's general manager with the manager of industrial water division and chief engineer make arrangement to host all the leaders in person. The manager of industrial water division introduced the treatment technologies of industrial wastewater in detail. The technical staff of Jinan Iron and Steel Group Co., Ltd present many questions for the company's coking wastewater treatment, the manager of industrial water division answer the questions for them one by one. After Technical exchanges, The technical staff of our company applied electromagnetic-field oxidation on a treatability test of biological treated coking wastewater for Jinan Iron and Steel Group Co., Ltd. The leadership of the company gave a high appraisal of the contrast effect of the treated wastewater and sewage liquid and hoped that we can have further cooperation.