&On April 17, 2020, Shandong Yiheng law firm held an expert consultant appointment ceremony. Professor Wu Danhong, director of the difficult evidence center of China University of political science and law, was invited to serve as the expert consultant of Shandong Yiheng law firm. At the appointment ceremony, Zhao Chunyong, director of Yiheng Institute, presented a letter of appointment to Professor Wu Danhong.