On the afternoon of May 28th, 2016, under the leadership of Prof. Pan Wei-- the doctoral tutor, the vice President and Secretary General of the Special Ceramics Branch of China Silicic Acid Society, the secretary of the Party Committee of Tsinghua University School of Materials, the director of the State Key Laboratory of New Ceramics and Fine Arts, 16 Ph.Ds. in Materials Science of Tsinghua University came to visit our company and exchange technical information.